mystring.h頭文件
#pragma once
class MyString
{
private:
char * m_str;
public:
MyString();
MyString(size_t length, char ch);
MyString(const char * cch);
MyString(const char * cch, int length);
const char * c_str() const;
~MyString();
};
mystring.cpp
#include "mystring.h"
#include <iostream>
MyString::MyString()
{
m_str = new char('\0');
}
MyString::MyString(size_t length, char ch)
{
m_str = new char[length + 1];
for (size_t i = 0; i < length; i++)
m_str[i] = ch;
m_str[length] = '\0';
}
MyString::MyString(const char * cch)
{
size_t length = 0;
const char *pStr = cch;
while ('\0' != *pStr)
{
length++;
pStr++;
}
m_str = new char[length + 1];
for (size_t i = 0; i < length; i++)
m_str[i] = cch[i];
m_str[length] = '\0';
}
MyString::MyString(const char * cch, int length)
{
int nlen = 0;
const char *str = cch;
while ('\0' != *str)
{
nlen++;
str++;
}
nlen = nlen < length ? nlen : length;
m_str = new char[nlen + 1];
for (int i = 0; i < nlen; i++)
m_str[i] = cch[i];
m_str[nlen] = '\0';
}
const char * MyString::c_str() const
{
return m_str;
}
MyString::~MyString()
{
if (NULL != m_str)
{
delete [] m_str;
}
}