设计思想：
在2的基础上加上一个判断，在题目生成输出后予以判断，如果是有余数或者是分数就分别判断商及余数或者分子分母是否正确。
程序源码：
import java.util.Random;
import javax.swing.*;
public class Arithmetic
{
static void add(int limit1,int limit2,int boolminus/*int boolremainder,int boolmultiply*/)
{
int number1=new Random().nextInt(limit2-limit1+1)+limit1;
int number2=new Random().nextInt(limit2-limit1+1)+limit1;
if(boolminus==0)
{
if(limit1<0||limit2<0)
{
System.out.println("您输入的范围有误");
}
else
{
System.out.println(number1+"+"+number2+"=");
String answer=JOptionPane.showInputDialog("please input answer");
int answer1=Integer.parseInt(answer);
if(answer1==number1+number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
else
{
System.out.println(number1+"+"+number2+"=");
String answer=JOptionPane.showInputDialog("please input answer");
int answer1=Integer.parseInt(answer);
if(answer1==number1+number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
static void subtract(int limit1,int limit2,int boolminus)
{
int number1=new Random().nextInt(limit2-limit1+1)+limit1;
int number2=new Random().nextInt(limit2-limit1+1)+limit1;
if(boolminus==0)
{
while(true)
{
if(number1<number2)
{
number1=new Random().nextInt(limit2-limit1+1)+limit1;
number2=new Random().nextInt(limit2-limit1+1)+limit1;
}
else
{
break;
}
}
if(limit1<0||limit2<0)
{
System.out.println("您输入的范围有误");
}
else if(limit1>=0||limit2>=0||number1>=number2)
{
System.out.println(number1+"-"+number2+"=");
String answer=JOptionPane.showInputDialog("please input answer");
int answer1=Integer.parseInt(answer);
if(answer1==number1-number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
else
{
System.out.println(number1+"-"+number2+"=");
String answer=JOptionPane.showInputDialog("please input answer");
int answer1=Integer.parseInt(answer);
if(answer1==number1-number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
static void multiply(int limit1,int limit2/*int boolremainder,*/)
{
int number1=new Random().nextInt(limit2-limit1+1)+limit1;
int number2=new Random().nextInt(limit2-limit1+1)+limit1;
System.out.println(number1+"*"+number2+"=");
String answer=JOptionPane.showInputDialog("please input answer");
int answer1=Integer.parseInt(answer);
if(answer1==number1*number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
static void divide(int limit1,int limit2,int boolremainder)
{
int number1=new Random().nextInt(limit2-limit1+1)+limit1;
int number2=new Random().nextInt(limit2-limit1+1)+limit1;
if(boolremainder==0)
{
while(true)
{
if(number1%number2!=0)
{
number1=new Random().nextInt(limit2-limit1+1)+limit1;
number2=new Random().nextInt(limit2-limit1+1)+limit1;
}
else
{
System.out.println(number1+"/"+number2+"=");
String answer=JOptionPane.showInputDialog("please input answer");
int answer1=Integer.parseInt(answer);
if(answer1==number1+number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
}
else
{
System.out.println(number1+"/"+number2+"=");
String answer1=JOptionPane.showInputDialog("请输入商");
int answer11=Integer.parseInt(answer1);
String answer2=JOptionPane.showInputDialog("请输入余数");
int answer22=Integer.parseInt(answer2);
if(answer11==number1/number2&&answer22==number1%number2)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
static void fraction(int limit1,int limit2,int numbers,int boolmultiply)
{
int i,j,k;
if(boolmultiply==0)
{
for(int o=numbers;o>0;o--)
{
int number1=new Random().nextInt(limit2-limit1+1)+limit1;
int number2=0;
while(true)
{
number2=new Random().nextInt(limit2-limit1+1)+limit1;
if(number2!=0)
break;
}
if(number1<number2)
i=number1;
else i=number2;
for(int ii=i+1;ii>=1;ii--)
{
if(number1%ii==0&&number2%ii==0)
{
number1=number1/ii;
number2=number2/ii;
break;
}
}
int number3=new Random().nextInt(limit2-limit1+1)+limit1;
int number4=0;
while(true)
{
number4=new Random().nextInt(limit2-limit1+1)+limit1;
if(number4!=0)
break;
}
if(number3<number4)
j=number3;
else j=number4;
for(int jj=j+1;jj>=1;jj--)
{
if(number3%jj==0&&number4%jj==0)
{
number3=number3/jj;
number4=number4/jj;
break;
}
}
k=new Random().nextInt(2);
if(k==0)
{
System.out.println(number1+"/"+number2+"+"+number3+"/"+number4+"=");
int fenzi=number1*number4+number2*number3;
int fenmu=number2*number4;
int small1;
if(fenzi<fenmu)
small1=fenzi;
else small1=fenmu;
for(int small11=small1+1;small11>=1;small11--)
{
if(fenzi%small11==0&&fenmu%small11==0)
{
fenzi=fenzi/small11;
number2=number2/small11;
break;
}
}
String answer=JOptionPane.showInputDialog("请输入分子");
int answer1=Integer.parseInt(answer);
String answer0=JOptionPane.showInputDialog("请输入分母");
int answer10=Integer.parseInt(answer0);
if(answer1==fenzi&&answer10==fenmu)
System.out.println("right!");
else
System.out.println("wrong!");
}
else if(k==1)
{
System.out.println(number1+"/"+number2+"-"+number3+"/"+number4+"=");
int fenzi=number1*number4-number2*number3;
int fenmu=number2*number4;
int small1;
if(fenzi<fenmu)
small1=fenzi;
else small1=fenmu;
for(int small11=small1+1;small11>=1;small11--)
{
if(fenzi%small11==0&&fenmu%small11==0)
{
fenzi=fenzi/small11;
number2=number2/small11;
break;
}
}
String answer=JOptionPane.showInputDialog("请输入分子");
int answer1=Integer.parseInt(answer);
String answer0=JOptionPane.showInputDialog("请输入分母");
int answer10=Integer.parseInt(answer0);
if(answer1==fenzi&&answer10==fenmu)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
}
else
{
for(int o=numbers;o>0;o--)
{
int number1=new Random().nextInt(limit2-limit1+1)+limit1;
int number2=0;
while(true)
{
number2=new Random().nextInt(limit2-limit1+1)+limit1;
if(number2!=0)
break;
}
if(number1<number2)
i=number1;
else i=number2;
int number3=new Random().nextInt(limit2-limit1+1)+limit1;
int number4=0;
while(true)
{
number4=new Random().nextInt(limit2-limit1+1)+limit1;
if(number4!=0)
break;
}
if(number3<number4)
j=number3;
else j=number4;
for(int ii=i+1;ii>=1;ii--)
{
if(number1%ii==0&&number2%ii==0)
{
number1=number1/ii;
number2=number2/ii;
break;
}
}
for(int jj=j+1;jj>=1;jj--)
{
if(number3%jj==0&&number4%jj==0)
{
number3=number3/jj;
number4=number4/jj;
break;
}
}
k=new Random().nextInt(4);
if(k==0)
{
System.out.println(number1+"/"+number2+"+"+number3+"/"+number4+"=");
int fenzi=number1*number4+number2*number3;
int fenmu=number2*number4;
int small1;
if(fenzi<fenmu)
small1=fenzi;
else small1=fenmu;
for(int small11=small1+1;small11>=1;small11--)
{
if(fenzi%small11==0&&fenmu%small11==0)
{
fenzi=fenzi/small11;
number2=number2/small11;
break;
}
}
String answer=JOptionPane.showInputDialog("请输入分子");
int answer1=Integer.parseInt(answer);
String answer0=JOptionPane.showInputDialog("请输入分母");
int answer10=Integer.parseInt(answer0);
if(answer1==fenzi&&answer10==fenmu)
System.out.println("right!");
else
System.out.println("wrong!");
}
else if(k==1)
{
System.out.println(number1+"/"+number2+"-"+number3+"/"+number4+"=");
int fenzi=number1*number4-number2*number3;
int fenmu=number2*number4;
int small1;
if(fenzi<fenmu)
small1=fenzi;
else small1=fenmu;
for(int small11=small1+1;small11>=1;small11--)
{
if(fenzi%small11==0&&fenmu%small11==0)
{
fenzi=fenzi/small11;
number2=number2/small11;
break;
}
}
String answer=JOptionPane.showInputDialog("请输入分子");
int answer1=Integer.parseInt(answer);
String answer0=JOptionPane.showInputDialog("请输入分母");
int answer10=Integer.parseInt(answer0);
if(answer1==fenzi&&answer10==fenmu)
System.out.println("right!");
else
System.out.println("wrong!");
}
else if(k==2)
{
System.out.println(number1+"/"+number2+"*"+number3+"/"+number4+"=");
int fenzi=number1*number3;
int fenmu=number2*number4;
int small1;
if(fenzi<fenmu)
small1=fenzi;
else small1=fenmu;
for(int small11=small1+1;small11>=1;small11--)
{
if(fenzi%small11==0&&fenmu%small11==0)
{
fenzi=fenzi/small11;
number2=number2/small11;
break;
}
}
String answer=JOptionPane.showInputDialog("请输入分子");
int answer1=Integer.parseInt(answer);
String answer0=JOptionPane.showInputDialog("请输入分母");
int answer10=Integer.parseInt(answer0);
if(answer1==fenzi&&answer10==fenmu)
System.out.println("right!");
else
System.out.println("wrong!");
}
else
{
System.out.println(number1+"/"+number2+"/"+number3+"/"+number4+"=");
int fenzi=number1*number4;
int fenmu=number2*number3;
int small1;
if(fenzi<fenmu)
small1=fenzi;
else small1=fenmu;
for(int small11=small1+1;small11>=1;small11--)
{
if(fenzi%small11==0&&fenmu%small11==0)
{
fenzi=fenzi/small11;
number2=number2/small11;
break;
}
}
String answer=JOptionPane.showInputDialog("请输入分子");
int answer1=Integer.parseInt(answer);
String answer0=JOptionPane.showInputDialog("请输入分母");
int answer10=Integer.parseInt(answer0);
if(answer1==fenzi&&answer10==fenmu)
System.out.println("right!");
else
System.out.println("wrong!");
}
}
}
}
public static void main(String[] args)
{
String choice0=JOptionPane.showInputDialog("是否有分数运算（有输入1，无输入0）");
String choice1=JOptionPane.showInputDialog("是否有乘除法（有输入1，无输入0）");
String choice2=JOptionPane.showInputDialog("请输入数值范围下限");
String choice21=JOptionPane.showInputDialog("请输入数值范围上限");
String choice5=JOptionPane.showInputDialog("需要多少道题");
int choice00=Integer.parseInt(choice0);
int choice11=Integer.parseInt(choice1);
int limit1=Integer.parseInt(choice2);
int limit2=Integer.parseInt(choice21);
int i=Integer.parseInt(choice5);
if(choice00==0)
{
String choice3=JOptionPane.showInputDialog("加法有无负数（有输入1，无输入0）");
int choice33=Integer.parseInt(choice3);
if(choice11==0)
{
for(;i>0;i--)
{
int j=new Random().nextInt(2);
if(j==0)
add(limit1,limit2,choice33);
else
subtract(limit1,limit2,choice33);
}
}
else if(choice11==1)
{
String choice4=JOptionPane.showInputDialog("除法有无余数（有输入1，无输入0）");
int choice44=Integer.parseInt(choice4);
for(;i>0;i--)
{
int j=new Random().nextInt(4);
if(j==0)
add(limit1,limit2,choice33);
else if(j==1)
subtract(limit1,limit2,choice33);
else if(j==2)
multiply(limit1,limit2);
else if(j==3)
divide(limit1,limit2,choice44);
}
}
}
else
{
fraction(limit1,limit2,i,choice11);
}
}
}