C++获取文件大小的几种方法

#include <iostream>
#include <fstream>
#include <windows.h>
#include <io.h>
#include <sys\stat.h>

using namespace std;

int main()
{
char *filepath = "D:\\1.TXT";

//方法一
HANDLE handle = CreateFileA( filepath, FILE_READ_EA, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0 );
if ( handle != INVALID_HANDLE_VALUE )
{
int size = GetFileSize( handle, NULL );
cout << size << endl;
CloseHandle( handle );
}

//方法二 C++流获取
ifstream fin( filepath );
if( fin.is_open() )
{
fin.seekg( 0, ios::end );
int size = fin.tellg();
fin.close();
cout << size << endl;
}

//方法三 C标准获取
FILE* file = fopen( filepath, "r" );
if ( file )
{
int size = filelength( fileno(file) );
cout << size << endl;
fclose( file );
}

//方法四
struct _stat info;
_stat(filepath, &info);
int size = info.st_size;
cout << size << endl;

return 0;
}