使用C库

  1. #include <stdio.h>
  2. #include <errno.h>
  3. #define BUFFER_SIZE 256
  5. int main(int argc,char* argv[]) {
  6.     FILE* infile, * outfile;
  7.     char rec[BUFFER_SIZE];
  8.     size_t byteIn, byteOut;
  9.     if (argc !=3)
  10.     {
  11.         printf("usage: cp file file2\n");
  12.         return 1;
  13.     }
  15.     fopen_s(&infile,argv[1], "rb");
  16.     if (infile == NULL)
  17.     {
  18.         perror(argv[1]);
  19.         return 2;
  20.     }
  22.     fopen_s(&outfile,argv[2], "wb");
  23.     if (outfile == NULL)
  24.     {
  25.         perror(argv[2]);
  26.         return 3;
  27.     }
  29.     while ((byteIn = fread(rec,1,BUFFER_SIZE,infile))>0)
  30.     {
  31.         byteOut = fwrite(rec, 1, BUFFER_SIZE, outfile);
  32.         if (byteOut != byteIn)
  33.         {
  34.             perror("fatal write error ");
  35.             return 4;
  37.         }
  39.     }
  40.     fclose(infile);
  41.     fclose(outfile);
  45.     return 0;
  46. }

使用windows 原生api

字符问题

  1. #include <stdio.h>
  2. #include <Windows.h>
  3. #define BUFFER_SIZE 256
  5. int main(int argc,LPTSTR argv[]) {
  6.     HANDLE hIn, hOut;
  7.     DWORD nIn, nOut;
  8.     CHAR buffer[BUFFER_SIZE];
  10.     if (argc < 3)
  11.     {
  12.         printf("usage: cp file file2\n");
  13.         return 1;
  14.     }
  15.     hIn = CreateFile(argv[1], GENERIC_READ, FILE_SHARE_READ, NULL,
  16.             OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
  18.     if (hIn == INVALID_HANDLE_VALUE)
  19.     {
  20.         wprintf(argv[2]);
  21.         printf("can not open file .error: %x\n", GetLastError());
  22.         return 2;
  24.     }
  25.     hOut = CreateFile(argv[2], GENERIC_WRITE, 0, NULL,
  26.         CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  28.     if (hOut == INVALID_HANDLE_VALUE)
  29.     {
  30.         printf("can not open outfile.error: %x\n", GetLastError());
  31.         return 3;
  32.     }
  33.     while (ReadFile(hIn,buffer,BUFFER_SIZE,&nIn,NULL) && nIn > 0)
  34.     {
  35.         WriteFile(hOut, buffer, BUFFER_SIZE, &nOut, NULL);
  36.         if (nIn != nOut)
  37.         {
  38.             printf("fatal write error:%x\n", GetLastError());
  39.             return 4;
  40.         }
  41.     }
  42.     CloseHandle(hIn); CloseHandle(hOut);
  45.     return 0;
  46. }


  1. #include <stdio.h>
  2. #include <Windows.h>
  3. #include <strsafe.h>
  6. int main(int argc,LPCWSTR  argv[]) {
  10.     WCHAR buffer[128];
  11.     ::StringCchPrintf(buffer,_countof(buffer),L"this is my string from %u",::GetCurrentProcessId);
  12.     ::MessageBox(nullptr,buffer,L"String Demo",MB_OK|MB_ICONINFORMATION);
  14.     WCHAR path[MAX_PATH];
  15.     ::GetSystemDirectory(path,_countof(path));
  16.     printf("system directory : %ws\n", path);
  19.     WCHAR computerName[MAX_COMPUTERNAME_LENGTH];
  20.     DWORD len = _countof(computerName);
  21.     if (!::GetComputerName(computerName, &len)) 
  22.     {
  23.         printf("computer name is : %ws (%u)\n", computerName,len);
  24.     }
  26.     SHELLEXECUTEINFO sei = { sizeof(sei) };
  27.     sei.lpFile = L"c:\\windows\\win.ini";
  28.     sei.lpVerb = L"open";
  29.     sei.nShow = SW_SHOWNORMAL;
  31.     ::ShellExecuteEx(&sei);
  36.     return 0;
  37. }

获取windows 版本

  1. #include <Windows.h>
  2. #define BUILD_WINDOWS
  3. #include <stdio.h>
  4. #include <VersionHelpers.h>
  5. int main()
  6. {
  7.     OSVERSIONINFO vi = { sizeof(vi) };
  8.     ::GetVersionEx(&vi);
  9.     printf("%u .%u .%u", vi.dwMajorVersion, vi.dwMinorVersion, vi.dwBuildNumber);
  10.     return 0;
  11. }