C++实现String类

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普通的浅拷贝

#define _CRT_SECURE_NO_WARNINGS 1#include<iostream>using namespace std;class String{public:    String(char* pStr = "")    {        if (NULL == pStr)        {            _pStr = new char[1];            *_pStr = '\0';        }        else        {            _pStr = new char[strlen(pStr) + 1];            strcpy(_pStr, pStr);        }           }    String(const String& s)        :_pStr(new char[strlen(s._pStr)+1])    {        strcpy(_pStr, s._pStr);    }    String& operator=(const String& s)    {        if (this != &s)        {            char* pTemp = new char[strlen(s._pStr) + 1];            strcpy(pTemp, s._pStr);            delete[] _pStr;            _pStr = pTemp;        }        return *this;    }    ~String()    {        if (_pStr)        delete[] _pStr;    }    void print()    {        cout << _pStr << endl;    }private:    char* _pStr;};int main(){    String a("hello");    String b(a);    String c = "hello word";    a.print();    b.print();    c.print();    return 0;}

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