#include
void main()
{
char command_begin;
double x;
double y;
char b; //suanshu fuhao
double z; //zhi
printf("*********** lunwangsheng 淘宝店简单计算机***********\n");
printf("是否运行计算(s继续,b停止)【注:只能计算加减乘除】: ");
scanf("%c",&command_begin);
while(command_begin=='s'||command_begin=='S')
{ printf("请输入一个简单的算式:");
scanf("%lf%c%lf",&x,&b,&y);
switch(b)
{ case'+':
z=x+y; printf("%lf\n",z);break;
case'-':
z=x-y; printf("%lf\n",z);break;
case'*':
z=x*y;printf("%lf\n",z); break;
case'/':
z=x/y;printf("%lf\n",z); break;
default:printf("你输入的不正确\n");
}
printf("是否继续运算(s继续,n停止):");
fflush(stdin);
scanf("%c",&command_begin);
}
}