C 随机出十道加减法的练习题并自动批改
#include<>
#include<>
#include<>
#include<>
int main(){
int a,b,c,d,ch,right,answer;
srand(time(NULL));
for(int i=0;i<10;i++){
a=rand()%10;
b=rand()%10;
ch=rand()%2+1;
switch(ch){
case 1: printf("%d + %d = \n",a,b) ; break; //加法
case 2: printf("%d - %d = \n",a,b) ; break;//减法
}
if(ch==1)
right=a+b;
else right =a-b;
printf("请输入您的答案：\n");
scanf("%d",&answer);
if(right == answer)
printf("计算正确！\n");
else printf("计算错误！\n");
}
}