qq_20388971的博客

#include #include #include using namespace std; class Triangle { public: //设置三条边的长度// void set(int x, int y, int z) { l1 = x; l2 = y; l3 = z; } //输出三角形面积// void print_area() { printf(“area=%6.2f\n”, area); } //已知三条边长度，利用海伦定理计算三角形面积// void area1(int l1,.

#include <iostream> #include <cstdio> using namespace std; //定义一个time类 // class Time { public: Time(int, int); void operator++(); //成员函数重载运算符// void display(); //打印 private: int minute, sec; }; Time::Time(int a, int b) { //构...