编写程序,开发一个简单的计算器,输入两个数后可以进行加减乘除等...答:include<stdio.h>int main(void){int a,b,c=0;char d;scanf("%d",&a);scanf("%c",&d);scanf("%d",&b);switch(d){case'+':c=(a+b);break;case'-':c=(a-b);break;case'*':c=(a*b);break;case'/':c=(a/b);break;}printf("%d%c%d=%d\n",a,d,b,c)...