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C++错误修改
#include "stdafx.h"#include<iostream>using namespace std;class X1{protected: int x;public: X1(int xx){x=xx;} void output() { cout<<"x="<<x; }};class Y1:private X1{ int y;public: Y1(int xx=0,int yy=0):X1(xx) {y=yy;} virtual void output() { cout<<"x="<<x<<",y="<<y<<endl; }};class Z1:protected X1{ int z;public: Z1(int xx=0,int zz=0):X1(xx) {z=zz;} virtual void output() { cout<<"x="<<x<<",z="<<z<<endl; }};void main(){ X1 a(2); Y1 b(3,4); Z1 c(5,6); X1* p[3]={&a,&b,&c}; for(int i=0;i<3;i++) { p[i]->output(); }}提问者：swatert
发布于2010-12-17
共1个回答
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jqxa1999 丨Lv 3
#include<iostream.h>class X1{protected: int x;public: X1(int xx){x=xx;} virtual void output()//这里也要标注virtual { cout<<"x="<<x; }};class Y1:public X1//应该用public继承{ int y;public: Y1(int xx=0,int yy=0):X1(xx) {y=yy;} virtual void output() { cout<<"x="<<x<<",y="<<y<<endl; }};class Z1:public X1{ int z;public: Z1(int xx=0,int zz=0):X1(xx) {z=zz;} virtual void output() { cout<<"x="<<x<<",z="<<z<<endl; }};void main(){ X1 a(2); Y1 b(3,4); Z1 c(5,6); X1* p[3]={&a,&b,&c}; for(int i=0;i<3;i++) { p[i]->output(); }} -
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