四则运算终极版

#include<fstream>

#include<iostream>

#include<stack>

#include<string>

#include<time.h>

using namespace std;

void chengchufa(int m,int s)

{

         int v;

         int  j[100],k[100],l[100];//用于检查重复的数组

         cout<<"请输入选择:1.有余数 2.无余数:"<<endl;

         cin>>v;

         for(int i=0;i<m;i++)

         {

                   int n=rand()%4; //产生随机数,运算符

                   int a=rand()%s;//产生1~s随机数

                   int b=rand()%s;//产生1~s随机数

                   j[i]=n;

                   k[i]=a;

                   l[i]=b;

                   for(int r=i-1;r>=0;r--)//向前检查重复,如果重复则重新生成

                   {

                            if(j[r]==j[i]&&k[r]==k[i]&&l[r]==l[i])

                            {

                                     int n=rand()%4; //产生随机数,运算符

                                     int a=rand()%s;//产生1~s随机数

                                     int b=rand()%s;//产生1~s随机数

                            }

                   }

                            if(n==0){

                                                        cout<<a<<"+"<<b<<"="<<endl;

                            }

                            else if(n==1){

                                                        cout<<a<<"-"<<b<<"="<<endl;

                            }

                            else if(n==2){

                                                        cout<<a<<"*"<<b<<"="<<endl;

                            }

                            else{

                                               if(a<b)//实现被除数比除数大

                                               {

                                                        int w;

                                                        w=a;

                                                        a=b;

                                                        b=w;

                                               }

                                               if(b==0)

                                               {

                                                        b++;

                                               }

                                               if(v==1)//有余数

                                               {

                                                        cout<<a<<"/"<<b<<"="<<endl;

                                               }

                                               if(v==2)

                                               {

                                                        a=a-a%b;

                                                        cout<<a<<"/"<<b<<"="<<endl;

                                               }

                            }

         }

}

void jiajianfa(int m,int s){

       

                   int u;

                   int  j[100],k[100],l[100];//用于检查重复的数组

                   cout<<"请输入选择:1有负数 2无负数"<<endl;

                   cin>>u;

                   for(int i=0;i<m;i++)

                   {

                            int n=rand() %2;//产生随机数,运算符的

                            int a=rand()%s;//产生1~s随机数

                            int b=rand()%s;//产生1~s随机数

                            j[i]=n;

                            k[i]=a;

                            l[i]=b;

                            for(int r=i-1;r>=0;r--)

                            {

                                     if(j[r]==j[i]&&k[r]==k[i]&&l[r]==l[i])

                                     {

                                               int n=rand()%4; //产生随机数,运算符

                                               int a=rand()%s;//产生1~s随机数

                                               int b=rand()%s;//产生1~s随机数

                                     }

                            }

                                             

                            if(u==1) //有负数

                            {

                                     if(n==0)

                                     {

                                               cout<<"(-"<<a<<")+"<<b<<"="<<endl;

                                     }

                                     else

                                     {

                                               cout<<a<<"-"<<b<<"="<<endl;

                                     }

                            }

                            if(u==2)//无负数

                            {

                                     if(a<b)//实现减法无负数

                                     {

                                               int w;

                                               w=a;

                                               a=b;

                                               b=w;

                                     }

                                     if(n==0)

                                     {

                                               cout<<a<<"+"<<b<<"="<<endl;

                                     }

                                     else

                                     {

                                               cout<<a<<"-"<<b<<"="<<endl;

                                     }

                            }

             }

       

}

void dayinfangshi(int m,int s){

         int t;

         cout<<"请输入选择1.在屏幕输出2.在文件输出"<<endl;

         cin>>t;

         if(t==1)

         {

                   for(int i=0;i<m;i++)

         {

                   int n=rand()%4; //产生随机数,运算符

                   int a=rand()%s;//产生1~s随机数

                   int b=rand()%s;//产生1~s随机数

                 

                   if(n==0){

                            cout<<a<<"+"<<b<<"="<<endl;

                   }

                   else if(n==1){

                            cout<<a<<"-"<<b<<"="<<endl;

                   }

                   else if(n==2){

                            cout<<a<<"*"<<b<<"="<<endl;

                   }

                   else{

                            if(a<b)//实现被除数比除数大

                            {

                                     int w;

                                     w=a;

                                     a=b;

                                     b=w;

                            }

                            if(b==0)

                            {

                                     b++;

                            }

                            cout<<a<<"/"<<b<<"="<<endl;

                   }

         }

         }

         if(t==2)

         {

                   ofstream outfile("f1.dat",ios::out);//定义文件流对象,打开磁盘文件f1.dat

                   if(! outfile)  //如果打开失败返回0值

                   {

                            cerr<<"open error!"<<endl;

                            exit(1);

                   }

         for(int i=0;i<m;i++)

         {

                   int n=rand()%4; //产生随机数,运算符

                   int a=rand()%s;//产生1~s随机数

                   int b=rand()%s;//产生1~s随机数

                 

                   if(n==0){

                            outfile<<a<<"+"<<b<<"="<<endl;

                   }

                   else if(n==1){

                            outfile<<a<<"-"<<b<<"="<<endl;

                   }

                   else if(n==2){

                            outfile<<a<<"*"<<b<<"="<<endl;

                   }

                   else{

                            if(a<b)//实现被除数比除数大

                            {

                                     int w;

                                     w=a;

                                     a=b;

                                     b=w;

                            }

                            if(b==0)

                            {

                                     b++;

                            }

                            outfile<<a<<"/"<<b<<"="<<endl;

                   }

         }

         outfile.close();

         }

}

int level(char m){//计算符号优先级

         switch(m)

         {

             case'+':

             case'-':

                       return 1;

                   case'*':

                   case'/':

                            return 2;

                   case'(':

                   case')':

                            return 0;

                   case'#':

                            return -1;

                   default:

                            break;

         }

}

void intToString(int n,string &a) //将数字转化为字符串的函数

{

         char str[256];

    sprintf(str,"%d",n);

         a=str;

}

void hunheyunsuan(int m,int f){

       

       

}

void panduandaan(int m,int f){//可以判断答案正确与否的出题

         int h;

         int count=0;//用来计算用户答对题的个数

         int daan;//用户输入的答案

         cout<<"请输入选择:"<<endl;

         cout<<"1.简单的运算(只有一种运算):"<<endl;

         cout<<"2.混合运算(可有多种运算):"<<endl;

         cin>>h;

         if(h==1)

         {

                            for(int i=0;i<m;i++)

                            {

             srand((int)time(0));

                                     int n=rand() %4;//产生随机数,运算符的

                                     int a=rand()%f+1;//产生1~f随机数

                                     int b=rand()%f+1;//产生1~f随机数

                                     if(n==0)

                                     {

                                               cout<<a<<"+"<<b<<"="<<endl;

                                               cout<<"请输入答案:"<<endl;

                                               cin>>daan;

                                               if(daan==a+b)

                                               {

                                                        cout<<"恭喜你答对了>>..<<!"<<endl;

                                                        count++;

                                               }

                                               else

                                               {

                                                        cout<<"很遗憾你打错咯!"<<endl;

                                               }

                                     }

                                     else if(n==1)

                                     {

                                               if(a<b)//实现被减数比减数大

                                               {

                                                        int w;

                                                        w=a;

                                                        a=b;

                                                        b=w;

                                               }

                                               cout<<a<<"-"<<b<<"="<<endl;

                                               cout<<"请输入答案:"<<endl;

                                               cin>>daan;

                                               if(daan==a-b)

                                               {

                                                        cout<<"恭喜你答对了>>..<<!"<<endl;

                                                        count++;

                                               }

                                               else

                                               {

                                                        cout<<"很遗憾你打错咯!"<<endl;

                                               }

                                     }

                                     else if(n==2)

                                     {

                                             

                                               cout<<a<<"*"<<b<<"="<<endl;

                                               cout<<"请输入答案:"<<endl;

                                               cin>>daan;

                                               if(daan==a*b)

                                               {

                                                        cout<<"恭喜你答对了>>..<<!"<<endl;

                                                        count++;

                                               }

                                               else

                                               {

                                                        cout<<"很遗憾你打错咯!"<<endl;

                                               }

                                     }

                                     else

                                     {

                                               if(a<b)//实现被除数比除数大

                                               {

                                                        int w;

                                                        w=a;

                                                        a=b;

                                                        b=w;

                                               }

                                               if(b==0)

                                               {

                                                        b++;

                                               }

                                               cout<<a<<"/"<<b<<"="<<endl;

                                               cout<<"请输入答案:"<<endl;

                                               cin>>daan;

                                               if(daan==a/b)

                                               {

                                                        cout<<"恭喜你答对了>>..<<!"<<endl;

                                                        count++;

                                               }

                                               else

                                               {

                                                        cout<<"很遗憾你打错咯!"<<endl;

                                               }

                                     }

                            }

                            cout<<"你一共答对了"<<count<<"道题"<<endl;

         }

         if(h==2)

         {

                   srand((int)time(0));

                   for(int i=0;i<m;i++)

                   {

                            int a1= rand()%9+1;//随机产生1~9中的数,为运算数的个数

                            string q[100]; //运算数

                            for(int i=0;i<a1;i++)//产生要运算的数

                            {

                                     int b1=rand()%f+1;

                                     intToString(b1,q[i]);

                            }

                            string w[100];//运算符

                            for(int j=0;j<a1-1;j++)

                            {

                                     int e=rand()%4;

                                     if(e==0)

                                     {

                                               w[j]='+';

                                     }

                                     if(e==1)

                                     {

                                               w[j]='-';

                                     }

                                     if(e==2)

                                     {

                                               w[j]='*';

                                     }

                                     if(e==3)

                                     {

                                               w[j]='/';

                                     }

                            }

                            string s="";  //接受算术表达式

                            for(int i=0;i<a1-1;i++)

                            {

                                     s+=q[i]+w[i];

                                     if(w[i]=="/"&&w[i+1]=="/"&&w[i+2]=="/")//遇到三个除号,要加括号

                                     {

                                               s+="("+q[i]+w[i]+")";

                                     }

                            }

                            int b2=rand()%100; //最后在加一个数,在最后一个运算符后

                            string s1;

                            intToString(b2,s1);

                            s+=s1;

                            cout<<s<<"="<<endl;

                            stack<char>y;  //运算符堆栈

                            stack<int>x;  //int堆栈

       

                            string ss;  //复制s

                            string l="";   //用于保存字符串

                            ss=s;

                            s+="#$";//#将y中的运算符都拿出来,$用于表示算式结尾

                            int i=0;  //s的下标偏移量

                            int j;

                            double c=0;  //存中间运算结果

                            bool m=1;  //判断表达式是否正确

                            while (s[i]!='$') //对表达式逐个字符扫过去

                            {

                                     //将数数字如x栈

                                     if(s[i]>47&&s[i]<58)

                                     {//0~9的ASCII码值为 47~58

                                               l+=s[i];

                                               for( j=i+1;s[j]>47&&s[j]<58;j++)

                                                        l+=s[j];

                                               x.push(atoi(l.c_str()));

                                               l=" ";

                                               i=j;

                                     }

                                     if(s[i]>=35&&s[i]<=47)//35-47是一段符号的ASCII区间,主要用于捕获符号

                                     {

                                               if(y.size()==0||s[i]=='('||level(s[i])>level(y.top()))

                                               {

                                                        y.push(s[i]);

                                               }

                                               else

                                               {

                                                        if(s[i]==')')//遇到‘)’的情况,直接将Y中的符号一个一个拿出来运算,直到遇见‘(’

                                                        {

                                                                 for(;y.top()!='(';y.pop())

                                                                 {

                                                                           char d=y.top();  //取栈顶的一个元素

                                                                           double a=x.top();

                                                                           x.pop(); //将栈顶元素删除掉

                                                                           double b=x.top();

                                                                           x.pop();

                                                                           switch(d)

                                                                           {

                                                                                    case'+':

                                                                                             {

                                                                                                       c=a+b;

                                                                                                       break;

                                                                                             }

                                                                                    case'-':

                                                                                             {

                                                                                                       c=b-a;

                                                                                                       break;

                                                                                             }

                                                                                    case'*':

                                                                                             {

                                                                                                       c=a*b;

                                                                                                       break;

                                                                                             }

                                                                                    case'/':

                                                                                             {

                                                                                                       c=b/a;

                                                                                                       break;

                                                                                             }

                                                                                    default:

                                                                                             break;

                                                                           }

                                                                           x.push(c);  //将结果放入x中

                                                                 }

                                                                 y.pop();    //将‘(’弹出栈x

                                                        }

                                                        else

                                                        {  //遇到+ ,-,*,/的处理

                                                                 for(;y.size()!=0&&level(s[i])<=level(y.top());y.pop())//将y中不小于当前符号优先级的符号拿出来,运算

                                                                 {

                                                                           {

                                                                                    char d=y.top();

                                                                                    int a=x.top();

                                                                                    x.pop();

                                                                                    int b=x.top();

                                                                                    x.pop();

                                                                                    switch(d)

                                                                                    {

                                                                                              case'+':

                                                                                                       {

                                                                                                                c=a+b;

                                                                                                                break;

                                                                                                       }

                                                                                             case'-':

                                                                                                       {

                                                                                                                c=b-a;

                                                                                                                break;

                                                                                                       }

                                                                                             case'*':

                                                                                                       {

                                                                                                                c=a*b;

                                                                                                                break;

                                                                                                       }

                                                                                             case'/':

                                                                                                       {

                                                                                                                c=b/a;

                                                                                                                break;

                                                                                                       }

                                                                                             default:

                                                                                                       break;

                                                                                    }

                                                                                    x.push(c);

                                                                           }

                                                                 }

                                                                 y.push(s[i]); //当前符号存入y

                                                        }

                                               }

                                               i++;

                                     }

                                     else

                                     { //35-58外的其他符号报错

                                               cout<<"出现"<<s[i]<<"表达式不正确";

                                               m=0;

                                               break;

                                     }

                            }

                            if(m)

                            {

                                     cout<<"请输入你的答案"<<endl;

                                     cin>>daan;

                                     if(daan==x.top())

                                     {

                                               cout<<"恭喜你答对了!"<<endl;

                                               count++;

                                     }

                                     else

                                     {

                                               cout<<"很遗憾你打错了!"<<endl;

                                     }

                            }

                   }

                   cout<<"你一共答对"<<count<<"道题!"<<endl;

         }

}

void main()

{

         int x;//进行选择的数

         q:cout<<"请选择要进行的运算:1.整数运算 2.真分数运算 3.退出程序"<<endl;

         cin>>x;

         switch(x)

         {

         case 1://进行整数的运算

                   {

                            int m;//题目的数量

                            cout<<"请输入想打印的数量:"<<endl;

                            cin>>m;

                          

                          

                            int s;//数值范围

                            cout<<"请输入想要计算的数值范围(1~ 你输入的数):"<<endl;

                            cin>>s;

                            int t;

                            cout<<"请输入选择:"<<endl;

                            cout<<"1.有乘除法"<<endl;

                            cout<<"2.无乘除法"<<endl;

                            cout<<"3.打印方式"<<endl;

                            cout<<"4.可以判断答案的出题"<<endl;

                            cin>>t;

                            if(t==1){//有乘除法

                                     chengchufa(m,s);

                                   

                            }      

                            if(t==2)//无乘除法

                            {

                                     jiajianfa(m,s);

                            }

                            if(t==3)

                            {

                                     dayinfangshi(m,s);

                            }

                            if(t==4)

                            {

                                     panduandaan(m,s);

                            }

                            goto q;

                   }

         case 2:

                   {

                            for(int i=0;i<30;i++)

                            {

                                     int c=rand()%100;//产生1~100随机数

                                     int d=rand()%100;//产生1~100随机数

                                     int e=rand()%100;//产生1~100随机数

                                     int f=rand()%100;//产生1~100随机数

                                   

                                     //保证为真分数

                                     if(c>d)

                                     {

                                               int t;

                                               t=d;

                                               d=c;

                                               c=t;

                                     }

                                     if(e>f)

                                     {

                                               int s;

                                               s=f;

                                               f=e;

                                               e=s;

                                     }

                                     if(d==0){d++;}  //分母不为零

                                     if(f==0){f++;}  //分母不为零

                                     //约分化为最简

                                     for(int a=c;a>0;a-- )

                                     {

                                               if(c%a==0&&d%a==0)

                                               {

                                                        c=c/a;

                                                        d=d/a;

                                                        break;

                                         }

                                     }

                                     for(int b=e;b>0;b-- )

                                     {

                                               if(e%b==0&&f%b==0)

                                               {

                                                        e=e/b;

                                                        f=f/b;

                                                        break;

                                         }

                                     }

                                     int n=rand() %4;   //产生运算符的随机数

                                   

                                     if(n==0){

                                               cout<<c<<"/"<<d<<"+"<<e<<"/"<<f<<"="<<endl;

                                     }

                                     else if(n==1){

                                               cout<<c<<"/"<<d<<"-"<<e<<"/"<<f<<"="<<endl;

                                     }

                                     else if(n==2){

                                               cout<<c<<"/"<<d<<"*("<<e<<"/"<<f<<")="<<endl;

                                     }

                                     else

                                     {

                                               cout<<c<<"/"<<d<<"/("<<e<<"/"<<f<<")="<<endl;

                                     }

                            }

                            goto q;

                   }

         case 3:

                   {

                            exit(0);

                   }

         }

}

大神的程序,没运行出来,先放这,慢慢研究

原文地址:https://www.cnblogs.com/keaidejava/p/6674145.html