文件追写：文件 ""E:\one.txt.log"" 写到""E:\two.txt.log""

#include <windows.h>#include<stdio.h>int main(){    HANDLE hFile;    HANDLE hAppend;    DWORD  dwBytesRead, dwBytesWritten, dwPos;    BYTE   buff[4096];// Open the existing file.hFile = CreateFile(TEXT("E:\\one.txt.log"), // open One.txtGENERIC_READ,             // open for reading0,                        // do not shareNULL,                     // no securityOPEN_EXISTING,            // existing file onlyFILE_ATTRIBUTE_NORMAL,    // normal fileNULL);                    // no attr. templateif (hFile == INVALID_HANDLE_VALUE){printf("Could not open One.txt.");return 0;}// Open the existing file, or if the file does not exist,// create a new file.hAppend = CreateFile(TEXT("E:\\two.txt.log"), // open Two.txtGENERIC_WRITE,            // open for writingFILE_SHARE_READ,          // allow multiple readersNULL,                     // no securityOPEN_ALWAYS,              // open or createFILE_ATTRIBUTE_NORMAL,    // normal fileNULL);                    // no attr. templateif (hAppend == INVALID_HANDLE_VALUE){printf("Could not open Two.txt.");return 0;}// Append the first file to the end of the second file.// Lock the second file to prevent another process from// accessing it while writing to it. Unlock the// file when writing is finished.do{if (ReadFile(hFile, buff, sizeof(buff), &dwBytesRead, NULL)){dwPos = SetFilePointer(hAppend, 0, NULL, FILE_END);LockFile(hAppend, dwPos, 0, dwBytesRead, 0);WriteFile(hAppend, buff, dwBytesRead, &dwBytesWritten, NULL);UnlockFile(hAppend, dwPos, 0, dwBytesRead, 0);}} while (dwBytesRead == sizeof(buff));// Close both files.CloseHandle(hFile);CloseHandle(hAppend);return 1;}