Question

用C语言编写一个计算器的程序 ，而且可以有多个运算符

Answer 1

# include <stdio.h>
int main(void)
{
double a, b;
int chose;

printf("欢迎使用我的计算器\n");
while (1)
{
printf("********************\n");
printf("1、两数相加\n");
printf("2、两数相减\n");
printf("3、两数相乘\n");
printf("4、两数相除\n");
printf("5、退出\n");
printf("********************\n");

scanf("%d", &chose);

/* if (chose<1 || chose>5)
{
printf("你的输入有误，请重新输入!\n");
continue;
}*/

switch (chose)
{
case 1:
printf("请输入第一个数字：\n");
scanf("%lf", &a);
printf("请输入第二个数字：\n");
scanf("%lf", &b);
printf("%lf+%lf = %lf\n", a, b, a+b);
break;
case 2:
printf("请输入第一个数字：\n");
scanf("%lf", &a);
printf("请输入第二个数字：\n");
scanf("%lf", &b);
printf("%lf-%lf = %lf\n", a, b, a-b);
break;
case 3:
printf("请输入第一个数字：\n");
scanf("%lf", &a);
printf("请输入第二个数字：\n");
scanf("%lf", &b);
printf("%lf*%lf = %lf\n", a, b, a*b);
break;
case 4:
printf("请输入第一个数字：\n");
scanf("%lf", &a);
printf("请输入第二个数字：\n");
scanf("%lf", &b);
printf("%lf/%lf = %lf\n", a, b, a/b);
break;
case 5:
printf("再见!\n");
return ;
default:
printf("你的输入有误，请重新输入!\n");
continue;

}

}
}