C++構造、析構、繼承、多型--一道筆試題都考到了
阿新 • • 發佈:2019-01-02
#include <stdio.h> class A { public: A() { printf("A constrution.\n"); } ~A() { printf("A deconstrution.\n"); } void funA(); virtual void funB(); }; void A::funA() { printf("A::funA ...\n"); } void A::funB() { printf("A::funB ...\n"); } class B : public A { public: B() { printf("B constrution.\n"); } ~B() { printf("B deconstrution.\n"); } void funA(); virtual void funB(); }; void B::funA() { printf("B::funA ...\n"); } void B::funB() { printf("B::funB ...\n"); } void main() { A *a = new B(); B b; a->funA(); a->funB(); b.funA(); b.funB(); delete a; }
寫出輸出結果:(呵呵,順便複習一下g++的編譯的幾個步驟)