C++获取文件大小的几种方法

#include 
#include 
#include 
#include 
#include 


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;
}