#ifndef _CSTRING_H_
#define _CSTRING_H_
class CString
{
public:
CString(char* data = nullptr);
~CString();
CString(const CString &str);
CString& operator=(const CString &str);
void Show();
private:
char *m_data;
};
#endif
#include "String.h"
#include<iostream>
#include <assert.h>
using namespace std;
CString::CString(char* data )
{
if (nullptr == data)
{
m_data = new char;
*m_data = '\0';
}
else
{
int len = strlen(data);
m_data = new char[len + 1];
strcpy(m_data, data);
}
}
CString::~CString()
{
if (m_data != nullptr)
{
delete[]m_data;
m_data = nullptr;
}
}
CString::CString(const CString &str)
{
int len = strlen(str.m_data);
m_data = new char[len + 1];
strcpy(m_data, str.m_data);
}
CString &CString::operator=(const CString &str)
{
if (this != &str)
{
CString tmp(str);
char* ptmp = tmp.m_data;
tmp.m_data = m_data;
m_data = ptmp;
}
return *this;
}
void CString::Show()
{
cout << m_data << endl;
}
cpp
运行
