自定义字符类

   当 VC不使用MFC，无法使用属于MFC的CString，为此自定义一个，先暂时使用，后续完善。

头文件：

#pragma once#define MAX_LOADSTRING 100 // 最大字符数class CString
{public:char *c_str, cSAr[MAX_LOADSTRING];WCHAR *w_str,wSAr[MAX_LOADSTRING];void operator = (const char *str); // = 操作，获得c字符串: str = "sss"; 式样void operator + (const CString str); // + 操作，获得s字符串加: s1 = s2 + s3; 式样void operator += (const CString str); // += 操作，获得s字符串加: s1 += "s2"; 式样int StrCount(void);// 返回字符串长度s.StrCount()
  CString(void);private:int iStrCount; // 字符串数量void CharToWChar(const char *pChar);//窄字符转宽字符void WCharToChar(WCHAR *pWideChar);//宽字符转窄字符 
};

C文件：

#include "stdafx.h"
#include "String.h"CString::CString(void)
{c_str = cSAr;w_str = wSAr;
}void CString::operator = (const char *str) // =
{if(str == NULL) return;iStrCount = strlen(str);//获取字符串长度for(int i = 0; i < iStrCount; i++)//转内存储 cSAr[i] = str[i];cSAr[iStrCount] = 0;CharToWChar(str);//转宽字符
}void CString::operator + (const CString str) // +
{//
}void CString::operator += (const CString str) // +=
{//
}int CString::StrCount(void)
{return iStrCount;
}void CString::CharToWChar(const char *pChar)//窄字符转宽字符
{if(pChar == NULL) return;int needWChar = MultiByteToWideChar(CP_ACP, 0, pChar, -1, NULL, 0);if(needWChar > 0){ZeroMemory(wSAr, (needWChar + 1) * sizeof(WCHAR));MultiByteToWideChar(CP_ACP, 0, pChar, -1, wSAr, needWChar);}
}void CString::WCharToChar(WCHAR *pWideChar)//宽字符转窄字符  
{if(pWideChar == NULL) return;int needBytes = WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, NULL, 0, NULL, NULL);if(needBytes > 0){ZeroMemory(cSAr, (needBytes + 1) * sizeof(char));WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, cSAr, needBytes, NULL, NULL);}
}