C++獲取文件大小方式(MFC，linux，C++，C)

四種C++獲取指定文件的大小

#include < iostream> 
#include < io.h> 
#include < sys\stat.h> 
#include < afx.h> 
#define _AFXDLL  
using namespace std;
void main()
{
	// 此文件在工程打開狀態下爲不可訪問  
	char* filepath = "..\\test.ncb";
	// C++獲取文件大小方法一  
	struct _stat info;
	_stat(filepath, &info);
	int size = info.st_size;
	cout < < size < < endl;
	// C++獲取文件大小方法二  
	FILE* file = fopen(filepath, "rb");
	if (file)
	{
		int size = filelength(fileno(file));
		cout < < size < < endl;
		fclose(file);
	}
	// C++獲取文件大小方法三  
	CFile cfile;
	if (cfile.Open(filepath, CFile::modeRead))
	{
		int size = cfile.GetLength();
		cout < < size < < endl;
	}
	// C++獲取文件大小方法四  
	HANDLE handle = CreateFile(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);
	}
}

轉載

https://developer.51cto.com/art/201002/182227.htm