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编写
/** Mother.cpp** Created on: 2014-4-2* Author: Administrator*/#include "Mother2.h"
#include <iostream>
using namespace std;
Mother2::Mother2() {}
void Mother2::print(){cout<<"this is mother2 print"<<endl;
}
Mother2::~Mother2() {}
/** Mother.h** Created on: 2014-4-2* Author: Administrator*/#ifndef MOTHER_H_
#define MOTHER_H_class Mother2 {
public:Mother2();virtual ~Mother2();void print();
};#endif /* MOTHER_H_ */
/** Father.cpp** Created on: 2014-4-2* Author: Administrator*/#include "Father.h"
#include <iostream>
using namespace std;
Father::Father() {cout<<"这是父类构造函数"<<endl;}
void Father::print(){std::cout<<"this is father print"<<std::endl;}Father::~Father() {cout<<"这是父类虚函数"<<endl;
}
/** Father.h** Created on: 2014-4-2* Author: Administrator*/#ifndef FATHER_H_
#define FATHER_H_class Father {
public:Father();virtual ~Father();virtual void print();
};#endif /* FATHER_H_ */
/** Mother.cpp** Created on: 2014-4-2* Author: Administrator*/#include "Mother.h"
#include <iostream>
using namespace std;
Mother::Mother() {cout<<"这是母类构造函数"<<endl;
}
void Mother::print(){cout<<"this is mother print"<<endl;
}
Mother::~Mother() {cout<<"这是母类虚函数"<<endl;
}
/** Mother.h** Created on: 2014-4-2* Author: Administrator*/#ifndef MOTHER_H_
#define MOTHER_H_class Mother {
public:Mother();virtual ~Mother();void print();
};#endif /* MOTHER_H_ */
/** Son.cpp** Created on: 2014-4-2* Author: Administrator*/#include "Son.h"
#include<iostream>
using namespace std;
Son::Son() {cout<<"这是子类构造函数"<<endl;}
void Son::print() {cout << "this is son demo" << endl;
}
;
Son::~Son() {cout<<"这是子类虚函数"<<endl;
}
/** Son.h** Created on: 2014-4-2* Author: Administrator*/#ifndef SON_H_
#define SON_H_#include "Father.h"class Son: public Father {
public:Son();virtual ~Son();void print();
};#endif /* SON_H_ */
//============================================================================
// Name : AA.cpp
// Author : zhubin
// Version :
// Copyright : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================
#include<iostream>
#include<stdio.h>
#include<math.h>
#include<cstring>
#include"first//Mother2.h"
using namespace std;
//==运算符重载定义================================================================
// 除了类属关系运算符"."、成员指针运算符".*"、作用域运算符"::"、sizeof运算符和三目运算符"?:"以外，C++中的所有运算符都可以重载
//.运算符“=”和“&”不必用户重载//======static============================================================
//int a;//全局变量也存储在静态数据区
//int main(){
// //int i;
// static char str[10];
// printf("integer: %d; string: (begin)%s(end)", a, str);
// return 0;
//}
//========static==========================================================
//class M {
//public:
// M(int a) {
// A = a;
// B += a;
// }
// static void f1(M m);
//private:
// int A;
// static int B;
//};
//
//void M::f1(M m) {
// cout << "A=" << m.A << endl; //此句话有问题,可改为对象引用,即:m.A
// cout << "B=" << B << endl;
//}
//
//int M::B = 0;
//void main() {
// M P(5), Q(10);
// M::f1(P);file: //调用时不用对象名
// M::f1(Q);
//}
//==================================================================
//int main ()
//{
// char *p =new char[6];char* p1= new char("hello");char* p1= new char('a');
// //error分配一个char(1字节)的空间,
// //用"Hello"来初始化,这明显不对
// //p="Hello";
// //不能将字符串直接赋值给该字符指针p，原因是：
// //指针p指向的是字符串的第一个字符，只能用下面的strcpy(p,"hellp");cout<<p<<endl;cout<<*p<<endl;
// int *a = new int(5);//new会在堆上分配一块内存，并会自动调用类的构造函数
// cout<<a<<endl;
// cout<<*a<<endl;
// string *str = (string*)operator new(sizeof(string));//重载new
// delete p,a;
// return 0;
//}
//============模板======================================================
(1)
//template<class T>
//class Base{
//
//};
//class Base1:public Base<int>{};
(2)
//template<class T>
//class Basem{
//
//};
//template<class T>
//class Basem1:public Basem<T>{
//
//};
//template<class T>
//class Test{
//private:
// T n;
// const T m;
// static T x;
//public:
// Test():n(0){}
// Test(T t){};
// ~Test();
// void print();
// T operator+(T t);
//};
//template<class T>
//void Test<T>::print(){
// cout<<"print"<<endl;
//}
//template<class T>
//int Test<T>::m=0;//初始化时候指定其类型
//template<class T>
//T Test<T>::operator +(T t){
// return n+x;
//}
//==================================================================
//class B0 //基类B0声明
//{
//public:
// B0(){}
// virtual void display() {
// cout << "B0::display()" << endl;
// }
// virtual ~B0(){}
// //公有成员函数
//};
//
//class B1: public B0 //公有派生类B1声明
//{
//public:
// //virtual B1(){}
// virtual void display() {
// cout << "B1::display()" << endl;
// }
// virtual ~B1(){}
// //公有成员函数
//};
//class D1: public B1 //公有派生类B1声明
//{
//public:
// //virtual D1(){}
// void display() {
// cout << "D1::display()" << endl;
// }
公有成员函数
//};
//void fun(B0 *ptr) //普通函数
// { //参数为指向基类对象的指针
// ptr->display(); //”对象指针—>成员名”
//}
//int main() //主函数
//{
// B0 b0; //声明B0类对象
// B1 b1; //声明B1类对象
// D1 d1; //声明D1类对象
// B0 *p; //声明B0类指针
// p = &b0; //B0类指针指向B0类对象
// fun(p);
// p = &b1; //B0类指针指向B1类对象
// fun(p);
// p = &d1; //B0类指针指向D土类对象
// fun(p);
// return 0;
//}
//==================================================================
//class Father{
// int a1,a2;
//public:
// Father(int a,int b){a1=a,a2=b;}
// ~Father(){}
//};
//class Son:Father{
// int a3;
//public:
// Son(int c,int d,int e):Father(c,d),a1(c),a2(d){a3=e;}//派生类参数表
// Son(int c,int d,int e):Father(c,d),a1(c),a2(d),a3(e){}//派生类参数表
// Son(int c,int d,int e):a3(c){}
//};
//常对象调用常函数
//class A{//对基类成员和子对象成员的初始化必须在成员初始化列表中进行，新增成员的初始化既可以在成员初始化列表中进行，也可以在构造函数体中进行
//private:
// int x,y;
// mutable int a;
// //static const int a=1;
// //const int b=1;
//public:
// void print();
// void print1()const;
// A(int x,int y,int a){this->x=x,this->y=y,this->a=a;}
// //A(int x,int y){this->x=x,this->y=y;}
// //A(){}
// ~A(){}
//};
//void A::print(){
// cout<<"print===x="<<x<<",y="<<y<<endl;
//}
mutable int a=5;const int b=5;
//void A::print1()const{
// a=44;//可以修改被定义成mutable的成员变量
// cout<<"print1===x="<<x<<",y="<<y<<"a="<<a<<endl;int c = a+b;
// //a=8;
// //b=9;
// //cout<<"a+b="<<c<<endl;
//}
//int main(){A a1(1,1);a1.print();a1.print1();const A a2(2,2);a2.print1();//常对象只能调用常成员
// A a3(0,0,0);
// a3.print1();
// a3.print1();
//}
//==================================================================
//class Point {
//private:
// int x,y;
//public:
// Point(int a,int b){x=a,y=b;}
// friend int len(const Point& p1,const Point& p2);
// void changePoint(int a,int b){x+=a,y+=b;}
// void print(void){
// cout<<"x="<<x<<",y="<<y<<endl;
// }
//};
//int len(const Point& p1,const Point& p2){
// int length =(int)sqrt((p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y));
//
// return length;
//}
//int main(){
// Point p1(10,10),p2(1,1);
// p1.changePoint(100,100);
// p1.print();
// len(p1,p2);
// cout<<"距离："<<len(p1,p2);
// return 0;
//}
//==================================================================
//windows 程序
//#include <windows.h>
//int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine,
// int iCmdShow) {
// MessageBox(NULL, "Hello", "Hello Demo", MB_OKCANCEL);
// return (0);
//}//dll
//#include "dllfct.h"
//#include <stdio.h>
//#include<iostream>
//using namespace std;
//int main() {tstfunc();
// cout<<"this is demo"<<endl;
// return (0);
//}
//==================================================================
//c++继承
//#include <iostream>
#include"Father.h"
#include"Mother.h"
#include"first/Mother2.h"
#include"Son.h"
using namespace std;
int main() {
cout<<"this is demo"<<endl;cout << "this is eclipse demo====" << endl;
//Mother m1;//母类构造
cout<<"mmm======"<<endl;
Son s;//先构造父类再子类
Mother2 m2;
Father f1;
cout<<"+++1++++++"<<endl;
Father* f2;//不生成构造
//m1.print();
cout<<"++++2+++++"<<endl;
m2.print();
f1.print();
s.print();f2= new Son;//创建两个构造f2->print();
delete f2;
return 0;
}
//==================================================================
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