C语言:编写一个简单的两位数加法、减法、乘法、除法计算程序,要求输入...答:int main(){ int a,b,c;char op;scanf("%d%c%d",&a,&op,&b);switch(op){ case '+':c=a+b;break;case '-':c=a-b;break;case '*':c=a*b;break;case '/':c=a/b;break;default:printf("Error!\n");return 0;} printf("%d%c%d=%d\n",a,op,b,c);return 0;} ...