weixin_42734445的博客

异常处理

#include <iostream>#include <memory>class T{public: T() : t(5) { } ~T() { std::cout << "destructor" << std::endl; std::cout << "t value" << t << std::endl; } T(T&& t1) { //this->t = t.

#include <iostream>class F{public: F() {} //virtual ~F() {} virtual void Print() { std::cout << "F::Print()" << std::endl; }};class S : public F{public: S() {} ~S() {} void Print() { std::cout << "S::Print()" &lt

nullptrnullptr用以区分0和NULL，因为本质上NULL等同于0。现有函数Test()，对其进行重载void test(void* p){ std::cout << "arguement: void *" << std::endl;}void test(int a){ std::cout << "arguement: int " << std::endl;}倘若传入NULL。test(NULL);结果如图：效果等同