C++ 模板类demo-白红宇

C++ 模板类demo

阅读量：6845 次

发布时间：2019-06-26

本文共 2569 字，大约阅读时间需要 8 分钟。

#include 
     
      using namespace std;template 
      
       class MyVector{    friend ostream & operator<< 
       
        (ostream &out,  const MyVector &obj);public:    MyVector(int size = 0);  //构造函数    MyVector(const MyVector &obj); // 拷贝构造函数    ~MyVector(); //析构函数public:    T& operator[] (int index);//返回引用    // a3 = a2 = a1;    MyVector &operator=(const MyVector &obj);    public:    int getLen()    {        return m_len;    }protected:    T *m_space;    int m_len;};

#include 
     
      using namespace std;#include "MyVector.h"template 
      
       ostream & operator<<(ostream &out,  const MyVector
       
         &obj){    for (int i=0; i

myv1(10);template

MyVector

::MyVector(int size) //构造函数{ m_space = new T[size]; m_len = size;}//MyVector

myv2 = myv1;template

MyVector

::MyVector(const MyVector &obj) // 拷贝构造函数{ //根据myv1的大小分配内存 m_len = obj.m_len; m_space = new T[m_len]; //copy数据 for (int i=0; i

MyVector

::~MyVector() //析构函数{ if (m_space != NULL) { delete [] m_space; m_space = NULL; m_len = 0; }}template

T& MyVector

::operator[] (int index){ return m_space[index];}// a3 = a2 = a1;template

MyVector

& MyVector

::operator=(const MyVector

&obj){ //先把a2的旧的内存释放掉 if (m_space != NULL) { delete[] m_space; m_space = NULL; m_len = 0; } //根据a1分配内存 m_len = obj.m_len; m_space = new T[m_len]; //copy数据 for (int i=0; i

#define _CRT_SECURE_NO_WARNINGS#include 
     
      using namespace std;#include "MyVector.cpp"//1  优化Teacher类, 属性变成 char *panme, 购置函数里面 分配内存//2  优化Teacher类,析构函数 释放panme指向的内存空间//3  优化Teacher类,避免浅拷贝 重载= 重写拷贝构造函数 //4  优化Teacher类,在Teacher增加 << //5  在模板数组类中,存int char Teacher Teacher*(指针类型)//=====>stl 容器的概念 class Teacher{public:    Teacher()    {        age = 33;        strcpy(name, "");    }    Teacher(char *name, int age)    {        this->age = age;        strcpy(this->name, name);    }    void printT()    {        cout << name << ", " << age << endl;    }private:    int age;    //char name[32];    char *pName2;};void main(){    Teacher t1("t1", 31), t2("t2", 32), t3("t3", 33), t4("t4", 34);    MyVector
      
        tArray(4);    tArray[0] = t1;    tArray[1] = t2;    tArray[2] = t3;    tArray[3] = t4;    for (int i=0; i<4; i++)    {        Teacher tmp = tArray[i];        tmp.printT();    }    cout << tArray;    system("pause");}void main02(){    MyVector
       
         myv1(10);    myv1[0] = 'a';    myv1[1] = 'b';    myv1[2] = 'c';    myv1[3] = 'd';    cout << myv1;    system("pause");}void main01(){    MyVector
        
          myv1(10);    for (int i=0; i

myv2 = myv1; for (int i=0; i

转载地址：http://mlbul.baihongyu.com/