cstring、string、wstring、int、char*、tchar、 int、dword等相互转换代码输出测试

#include <string>
#include <tchar.h>  // _TCHAR
#include <stdlib.h>
#include <iostream>  
#include <atlstr.h>  //Cstring 
#include <atlconv.h> //W2A宏
#include <xstring>

using namespace std;

int _tmain(int argc,_TCHAR* argv[])
{
    /**********string->cstring ***********/
    //setlocale(LC_ALL, "Chinese-simplified");
    //wcout.imbue(locale("chs"));
    //std::string str = "123456！";
    //CString cstr = _T("");
    //方式一
    //cstr.Format(_T("%s"),str.c_str());
    //方式二
    //for(int i = 0; i < (int)str.length(); ++i)
    //{
    //    cstr += str[i]; 
    //}
    //方式三
    //cstr = str.c_str();
    //wcout << cstr << endl;

    /************    cstring->string      **************/
    //方式一
    //CString cstr1 = _T("this is cstring！");
    //string str1 = "";
    //str1 = cstr1.GetBuffer();
    //cstr1.ReleaseBuffer();
    //方式二
    //for (int i = 0; i < cstr1.GetLength(); ++i)
    //{
    //    str1 += cstr1[i];
    //}
    //方式三 W2A宏
    //str1 = W2A(cstr1);//用法还没弄懂,需要加入一些文件头 或宏定义   ？？？

    //cout << str1 << endl;

    /************* string-> char*************/
    //string str2 = "this is string2！";
    //方式一
    //char *p = (LPSTR)str2.c_str();
    //方式二
    //char t[200];
    //memset(t, 0,200);
    //strcpy(t,str2.c_str());
    //方式三   出现warning C4305: “=”: 从“int”到“char”截断   ？？？
    //char *pc = new char[str2.length() + 1];
    //pc[str2.length()] = '/0';
    //for (int i = 0; i < str2.length(); ++i)
    //{
    //    pc[i] = str2[i];
    //}
    //pc[str2.length()] = '/0';
    //cout << pc << endl;

    /****************** char*->string ******************/
    //char *pch = "this a char！";
    //方式一  只能用作初始化
    //string str3(pch); 
    //方式二  assign()赋值
    //string str3;
    //str3.assign(pch);
    //cout << str3 << endl;

    //string是ansi编码字符char
    //TCHAR是unicode编码字符wchar_t
    /***********  string -> TCHAR* *********/
    //使用MultiByteToWideChar()函数
    
    /***********  TCHAR* ->string *********/
    //使用 WideCharToMultiByte()函数

    /**************** string 和char*转int ******************/
    //int atoi(const char *nptr);  
    //long atol(const char *nptr);  
    //long long atoll(const char *nptr);  
    //long long atoq(const char *nptr); 

    /*******************int转char*和string************************/
    //使用itoa();itoa(i,str,10);

    /*******************  wstring转Csting     *****************/
    //wstring wstr = L"this a wstring！你好啊";
    //CString cstr4 = _T("");
    //cstr4 = wstr.c_str();
    //cout << cstr4 << endl;

    /*******************  Csting ->wstring  *****************/
    //CString cstr5 = _T("this a cstring5!");
    //wstring wstr5 = L"";
    //wstr5 = cstr5.AllocSysString();
    //wcout << wstr5 << endl;
    
    /********* Cstring转char* *************/
    //CString cstr6 = _T("this cstring6!");
    //char* pch6 = "";
    //pch6 = cstr6.GetBuffer();
    //cout << pch6 << endl;
    //cstr6.ReleaseBuffer();

    /************ char *转Cstring **********/
    //char pch[20] = "this a char* !";
    //CString str7 = _T("");
    //str7.Format("%s",pch);
    //cout << str7 << endl;

    /*********** TCHAR -> char ************/
    //TCHAR *pTch = _T("this a TCHAR");
    //int nLength = 2 * strlen(pTch);
    //char* pCh = new char[nLength + 1];
    //memset(pCh,0, nLength + 1);
    //strcpy(pCh, pTch);
    //cout << pCh << endl;
    
    /*********** char转tchar ************/
    
    system("pause");
    return 0;
}