可变长字符串以及数字与字符串的互转
本文来自http://blog.csdn.net/hellogv/
//----------------------------------------------------------------------------------------------------------
//使用方法：
//先用string类型处理字符串，当要传递参数时(参数为LPCWSTR)，才把string to wstring ,然后再传递wstring.c_str();
//-----------------------------------------------------------------------------------------------------------
#include <windows.h>
#include <atlbase.h>
#include <sstream>
#include <string>
using namespace std;
string Int2Str(int i)
{
ostringstream os;
os << i;
return os.str();
};
int Str2Int(string str)
{
return atoi(str.c_str());
}
//------wstring to string
string ws2s(wstring& inputws)
{
LPCWSTR pwszSrc=inputws.c_str();
int nLen = WideCharToMultiByte(CP_ACP, 0, pwszSrc, -1, NULL, 0, NULL, NULL);
if (nLen<= 0) return std::string("");
char* pszDst = new char[nLen];
if (NULL == pszDst) return std::string("");
WideCharToMultiByte(CP_ACP, 0, pwszSrc, -1, pszDst, nLen, NULL, NULL);
pszDst[nLen -1] = 0;
std::string strTemp(pszDst);
delete [] pszDst;
return strTemp;
}
//------string to wstring
std::wstring s2ws(const string& s)
{
LPCSTR pszSrc=s.c_str();
int nLen=s.size();
int nSize = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)pszSrc, nLen, 0, 0);
if(nSize <= 0) return NULL;
WCHAR *pwszDst = new WCHAR[nSize+1];
if( NULL == pwszDst) return NULL;
MultiByteToWideChar(CP_ACP, 0,(LPCSTR)pszSrc, nLen, pwszDst, nSize);
pwszDst[nSize] = 0;
if( pwszDst[0] == 0xFEFF) // skip Oxfeff
for(int i = 0; i < nSize; i ++)
pwszDst[i] = pwszDst[i+1];
wstring wcharString(pwszDst);
delete pwszDst;
return wcharString;
};