@5614boss#include <stdlib.h>
#include <stdio.h>
int main()
{
int a,b;
char c;
while(1){
scanf("%d%c%d",&a,&c,&b);
if(c=='+')printf("%d\n",a+b);
else if(c=='-')printf("%d\n",a-b);
else if(c=='*')printf("%d\n",a*b);
else if(c=='/')printf("%.6f\n",(float)a/b);
else printf("syntax error\n");
}
return 0;
}
除法精确到小数点后6位