#include <stdio.h>
int main (void)
{
printf ("\t**************\n");
printf ("\t* 1:加法. *\n");
printf ("\t* 2:减法. *\n");
printf ("\t* 3:乘法. *\n");
printf ("\t* 4:除法. *\n");
printf ("\t* 0:退出. *\n");
printf ("\t**************\n");
short int a;
scanf ("%hd",&a);
double b,c;
while (a!=0)
{
printf ("\n输入两个数以得到结果\n");
scanf ("%lf %lf",&b,&c);
if (a==1)
printf ("%.2lf",b+c);
if (a==2)
printf ("%.2lf",b-c);
if (a==3)
printf ("%.2lf",b*c);
if (a==4)
printf ("%.2lf",b/c);
printf ("\n\t**************\n");
printf ("\t* 1:加法. *\n");
printf ("\t* 2:减法. *\n");
printf ("\t* 3:乘法. *\n");
printf ("\t* 4:除法. *\n");
printf ("\t* 0:退出. *\n");
printf ("\t**************\n");
scanf ("%hd",&a);
}
}
新版计算器

看我这一打就是标准的十五字啊啊