C语言实现四则运算

#include<stdio.h>
#include<time.h>
main()
{
int i，a,b,c;
srand((unsigned)time(NULL));
for(i=0;i<50;i++)
{
a=rand()%101;
b=rand()%101;
printf("%d",&a);
printf("%d",&b);
while(a!=0&&b!=0){
 case1:printf("%d+%d=%d",a,b,c=a+b);break;
 case2:printf("%d-%d=%d",a,b,c=a-b);break;
 case3:printf("%d*%d=%d",a,b,c=a*b);break;
 case4:printf("%d/%d=%d",a,b,c=a/b);break;
}
break;
}
}