main(){int a,b;float h;char c;scanf("%d%d%c",&a,&b,&c);switch(c)case'+':h=a+b;break;case'-':h=a-b;break;case'*':h=a*blbreak;case'/':h=a/b;break;default:printf("输入符号错误");}printf("%d%c%d=%d\n",a,c,b,h);