c++ 系統函數實現文件拷貝

#include "stdafx.h"
#include <string>
#include<windows.h>
#include<iostream>
#include <stdio.h>
#include<cstring>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
   CopyFile(L"D:/cAddProgram/source_file/file1.txt", L"D:/cAddProgram/source_file/file3.txt", TRUE);

   return 0;
}

實現文件拷貝截圖：