C语言简易计算器

#include
#include

int main()
{int n;int sum,n1,n2;char sign;
    printf("tC语言简易计算器n");
 printf("   加(＋) 减(-) 乘(*) 除(/)n输入格式:6*7,7-1,8/7n");

while(printf("请输入计算的数据:")&&(scanf("%d%c%d",&n,&sign,&n1)))
{switch(sign){
case '+':sum=n+n1;printf("t%d+%d=%dn",n,n1,sum);break;

case '-':sum=n-n1;printf("t%d-%d=%dn",n,n1,sum);break;

case'*':sum=n*n1;printf("t%d*%d=%dn",n,n1,sum);break;

case'/':sum=n/n1;printf("t%d/%d=%dn",n,n1,sum);break;

case'%':sum=n%n1;printf("t%d(%)%d=%dn",n,n1,sum);break;
default:printf("输入错误");break;}}

}