四则运算2.0版本

王老师要求四则运算要增加要求：支持真分数、不重复、定制数量。

预估时间：5 h

实际时间：5天晚上40min

设计如下

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int takeTest();
char getSignal();
int random(double,double);
int getResult(int,int,char);
int takeTest1();
int takeTest2();
void main()
{
int n,a,m;
printf("请输入题目数:");
scanf("%d",&n);
srand((unsigned)time(NULL));
for(int i=0;i<n;i++)
{
m=rand()%101 ;
if(m<50)
a=takeTest1();
else a=takeTest2();
}
printf("完成! ");
}
char getSignal()
{
char signal[4]={'+','-','*','/'};
srand((unsigned)time(NULL));
return signal[rand()%4];
}
int random(double start, double end)
{
return (int)(start+(end-start)*rand()/(RAND_MAX+ 1.0));
}
int getResult(int num1,int num2,char signal)
{
int res;
switch(signal)
{
case '+':
res=num1+num2;break;
case '-':
res=num1-num2;break;
case '*':
res=num1*num2;break;
case '/':
res=num1/num2;break;
default:
printf("运算符错误！ ");
}
return res;
}
int takeTest1()
{
int get;
int num1,num2,a;
char signal;
srand((unsigned)time(NULL));
signal=getSignal();

num1=random(0,100);
num2=random(1,100);
if(signal=='-')
{
if(num1<num2)
{
int temp;
temp=num1;
num1=num2;
num2=temp;
}
}
if(signal=='/')
{
if(num2==0)
{
int temp;
temp=num1;
num1=num2;
num2=temp;
}
}
printf("%d%c%d=",num1,signal,num2);
scanf("%d",&get);
fflush(stdin);
if(getResult(num1,num2,signal)==get)
{
printf("Right! ");
a=1;
}
else
{
printf("It's wrong! ");
printf("The right answer is: %d ",getResult(num1,num2,signal));
a=0;
}
return a;
}
int takeTest2()
{
float get,num1,num2;
int x1,x2,y1,y2,t,f,a;
char signal,s='/';
srand((unsigned)time(NULL));
signal=getSignal();
x1=random(0,100);
x2=random(0,100);
y1=random(0,100);
y2=random(0,100);
if(x2<x1)
{
t=x1;
x1=x2;
x2=t;
}
num1=x1/x2;
if(y2<y1)
{
f=y1;
y1=y2;
y2=f;
}
num2=y1/y2;
if(signal=='-')
{
if(num1<num2)
{
int temp;
temp=num1;
num1=num2;
num2=temp;
}
}
if(signal=='/')
{
if(num2==0)
{
int temp;
temp=num1;
num1=num2;
num2=temp;
}
}
printf("%d%c%d%C%d%c%d=",x1,s,x2,signal,y1,s,y2);
scanf("%d",&get);
fflush(stdin);
if(getResult(num1,num2,signal)==get)
{
printf("Right! ");
a=1;
}
else
{
printf("It's wrong! ");
printf("The right answer is: %d ",getResult(num1,num2,signal));
a=0;
}
return a;
}

 

有点问题需要改正就是分数运算的问题，不能正确验证答案，都是0，需要后续改正