#include<stdio.h>
#include<stdlib.h>
int main()
{
int right=0;
int wrong=0;
int choise;
int s=0;
printf("简易四则运算\n\n");
printf("请选择：加法输入1，减法输入2，乘法输入3，除法输入4,退出运算5\n");
while(s==0)
{
scanf("%d",&choise);
switch(choise)
{
case 1:
{
int a,b,c;
a=1+rand()%100;
b=1+rand()%100;
printf("请回答：\n\t\t %d + %d = ",a,b);
scanf("%d",&c);
if(a+b==c)
{
printf("回答正确!\n");
right++;
}
else
{
printf("回答错误!\n");
wrong++;
}
}
break;
case 2:
{
int a,b,c;
a=rand()%100;
b=rand()%100;
printf("请回答：\n\t\t %d - %d = ",a,b);
scanf("%d",&c);
if(a-b==c)
{
printf("回答正确!\n");
right++;
}
else
{
printf("回答错误!\n");
wrong++;
}
}
break;
case 3:
{
int a,b,c;
a=rand()%100;
b=rand()%100;
printf("请回答：\n\t\t %d * %d = ",a,b);
scanf("%d",&c);
if(a*b==c)
{
printf("回答正确!\n");
right++;
}
else
{
printf("回答错误!\n");
wrong++;
}
}
break;
case 4:
{
int a,b,c;
a=rand()%100;
b=1+rand()%100;
int y=0;
while(y<1000)
{
y++;
if(a%b==0)
{
printf("请回答：\n\t\t %d / %d = ",a,b);
scanf("%d",&c);
if(a/b==c)
{
printf("回答正确!\n");
right++;
}
else
{
printf("回答错误!\n");
wrong++;
}
break;
}
else
{
a=rand()%100;
b=1+rand()%100;
}
}
}
break;
case 5:printf("您总共完成了 %d 道题\n正确 %d 道\n错误 %d 道\n",right+wrong,right,wrong);
default:printf("enter data error!");
}
}
return 0;
}
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