程序代码：

#include<windows.h>
#include<stdio.h>
#include<stdlib.h>

void Copyself()
{
    wchar_t szSelfName[MAX_PATH] = {0};
    wchar_t szWindowsPath[MAX_PATH] = {0};
    wchar_t szSystemPath[MAX_PATH] = {0};
    wchar_t szTemPath[MAX_PATH] = {0};

    GetModuleFileName(NULL, szSelfName, MAX_PATH);
    GetWindowsDirectory(szWindowsPath, MAX_PATH);
    GetSystemDirectory(szSystemPath, MAX_PATH);

    strcat((char*)szWindowsPath, "\\test.txt");
    strcat((char*)szSystemPath, "\\test.txt");

    CopyFile(szSelfName, szWindowsPath, FALSE);
    CopyFile(szSelfName, szSystemPath, FALSE);

}

void GetSysInfo()
{
    wchar_t szComputerName[MAXBYTE] = {0};
    wchar_t szUserName[MAXBYTE] = {0};
    unsigned long nSize = MAXBYTE;
    OSVERSIONINFO OsVER;
    
    OsVER.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    GetVersionEx(&OsVER);
    
    if( OsVER.dwOSVersionInfoSize == VER_PLATFORM_WIN32_NT)
    {
        if(OsVER.dwMajorVersion == 5 && OsVER.dwMajorVersion == 1)
        {
            printf("Windows xp %s \r\n", OsVER.szCSDVersion);
        }
        else if(OsVER.dwMajorVersion == 5 && OsVER.dwMajorVersion == 0)
        {
            printf("Windows 2k \r\n");
        }
    }
    else
    {
        printf("Ohter system\r\n");
    }

    GetComputerName(szComputerName, &nSize);
    printf("Computer Name is %s \r\n", szComputerName);
    nSize = MAXBYTE;
    GetUserName(szUserName, &nSize);
    printf("User Name is %s \r\n", szUserName);

}

int main()
{
    void Copyself();
    void GetSysInfo();
    
    system("pause");

    return 0;
}