#include<stdio.h>double calculator(double a, double b, char operator){if (operator=='+'){return a+b;}else if (operator=='-'){return a-b;}else if (operator=='*'){return a*b;}else if (operator=='/'){if(b==0){printf(" 输入的有误,除数不能为零\n");}else{return a/b;}}else&...【阅读全文】