C++ 抽象类实现交通工具：飞机和火车

#include using namespace std;

// 抽象类 Vehicle class Vehicle{ public: virtual float travelTime(float) = 0; // 纯虚函数，计算旅程时间 virtual void setSpeed(float) = 0; // 纯虚函数，设置交通工具速度 };

// Plane 类 class Plane:public Vehicle{ private: float speed; // 飞行速度 public: Plane(float s = 1000):speed(s){} float travelTime(float distance){ return distance/speed; } void setSpeed(float s){ speed = s; } float getSpeed(){ return speed; } };

// Train 类 class Train:public Vehicle{ private: float speed; // 行驶速度 public: Train(float s = 100):speed(s){} float travelTime(float distance){ return distance/speed; } void setSpeed(float s){ speed = s; } float getSpeed(){ return speed; } };

// 主函数 int main(){ Vehicle *v; Plane p; Train t; int i; float s, d; cout << "飞机的速度：" << p.getSpeed() << endl; cout << "火车的速度：" << t.getSpeed() << endl; cout << "请输入交通工具类型号（1飞机，2火车）、速度以及路程：" << endl; cin >> i >> s >> d; if(i == 1 || i == 2){ if(i == 1){ v = &p; v->setSpeed(s); cout << "飞机的旅程时间：" << v->travelTime(d) << endl; } else{ v = &t; v->setSpeed(s); cout << "火车的旅程时间：" << v->travelTime(d) << endl; } } return 0; }