内容纲要
#include<stdio.h>
int main()
{
int a,b,r;//数1 数2 result
char c;//符号
if(scanf("%d %c %d",&a,&c,&b)!=3)
{
printf("ERROR");
goto end;
}
switch(c)
{
case '+':r=a+b;break;
case '-':r=a-b;break;
case '*':r=a*b;break;
case '/':r=a/b;break;
case '%':r=a%b;break;
default :printf("ERROR");goto end;;break;
}
printf("%d",r);
end: //标记结束
return 0;
}
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