C\C++对大文件的快速读写

#include

#include

#include

#include

using namespace std;

int   main() 

{ 

HANDLE       fh; 

HANDLE       MapFileH; 

HANDLE       OpenMap; 

HANDLE       MapHandle; 

fh=CreateFile("C:\cpp_1000000.txt ",  GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL, NULL);       

    if(fh   ==   INVALID_HANDLE_VALUE)       

{       

cout<< "Error   in   CreateFile   ! " <

return       FALSE;       

} 

MapFileH=CreateFileMapping( fh,NULL,PAGE_READWRITE,0,0,"Resource " ); 

if(MapFileH   ==   NULL) 

{ 

cout << "Error   in   CreateFileMapping! " <

} 

OpenMap=OpenFileMapping(FILE_MAP_ALL_ACCESS,true, "Resource " ); 

if(OpenMap   ==   NULL) 

{ 

cout<< "Error   in   OpenFileMapping! " <

} 

MapHandle=MapViewOfFile( OpenMap, FILE_MAP_ALL_ACCESS, 0, 0, 0 ); 

if(MapHandle   ==   NULL) 

{ 

cout   << "Error   in   MapViewOfFile! " <

} 

//     对数据进行处理。 

UnmapViewOfFile(MapHandle); 

CloseHandle(OpenMap); 

CloseHandle(fh); 

return   0; 

}