用c++编写一个程序,输入两个实数和一个四则运算符(+,-,*,/),根据运算...答:include<stdio.h>int main(){double a,b,c; char op; scanf("%lf%c%lf",&a,&op,&b); if(op=='+')c=a+b; else if (op=='-')c=a-b; else if (op=='*')c=a*b; else if (op=='/') if(b)c=a/b; else {printf("除数不能为0!\n"); return 0;} pr...