简单计算器

# include "stdio.h"
int main(void)
{
  char c;
  float a,b;
  printf("请输入：");
  scanf("%f%c%f",&a,&c,&b);
  switch(c)
  {
      case '+':printf("%.3f%c%.3f=%.3f\n",a,c,b,a+b);break;
      case '-':printf("%.3f%c%.3f=%.3f\n",a,c,b,a-b);break;
      case '*':printf("%.3f%c%.3f=%.3f\n",a,c,b,a*b);break;
      case '/':printf("%.3f%c%.3f=%.3f\n",a,c,b,a/b);break;
      default:printf("输入有误！！！\n");
  }
}