shfscut的博客

1.安装sudo apt-get install build-essential2.源代码编写 hello.cpp#include <iostream>int main(){ std::cout<<"hello world!\n"; return 0;}3.编译gcc hello.cpp -o hello错误：undefined reference to `std::cout

先看实例：#include <iostream>class Mammal{public: // constructors Mammal():itsAge(2), itsWeight(5){} ~Mammal(){}protected: int itsAge; int itsWeight;};class Dog: public Mammal{pub

覆盖(override):如果派生类创建的成员函数具有与基类中的成员函数相同的返回类型和签名，但是具有新的实现example:class Mammal: void Sleep() const {std::cout<<"I'm sleeping\n";} void Sleep(int time) const {std::cout<<"I'm sleeping"<<time<<"\n"