#include<stdio.h>
int main()
{
int i,x,y,z;
for(i=0;i<30;i++)
{
x=rand()%(99-10+1)+10;
y=rand()%(99-10+1)+10:
z=rand()%(4-1+1)+1;
switch(z)
{
case1:printf("%d+%d=\n",x,y):
case2:printf("%d-%d=\n",x,y);
Case3:printf("%d*%d=\n",x,y):
Case4:printf("%d/%d=\n",x,y);
}
}
return0;
}
软件工程四则运算
原文：https://www.cnblogs.com/guhaolei97/p/9751927.html
