bool bRet = true;

     std::ofstream fout(szDestFile, std::ios::binary | std::ios::app);

     std::ifstream fin(szOrigFile, std::ios::binary); 

     if (fin.bad())

     {

         bRet = false;

     }

     else

     {

         while(!fin.eof())

         {

             char szBuf[] = {}; 

             fin.read(szBuf, sizeof(char) * ); 

             if (fout.bad())

             {

                 bRet = false;

                 break;

             } 

             //

             fout.write(szBuf, sizeof(char) * );

         }

     } 

     fin.close();

     fout.close(); 

 filebuf *pbuf;

   ifstream filestr;

   long size;

   char * buffer;

   // 要读入整个文件，必须采用二进制打开

   filestr.open ("test.txt", ios::binary);

   // 获取filestr对应buffer对象的指针

   pbuf=filestr.rdbuf(); 

   // 调用buffer对象方法获取文件大小

   size=pbuf->pubseekoff (,ios::end,ios::in);

   pbuf->pubseekpos (,ios::in); 

   // 分配内存空间

   buffer=new char[size]; 

   // 获取文件内容

   pbuf->sgetn (buffer,size); 

   filestr.close();

   // 输出到标准输出

   cout.write (buffer,size); 

   delete []buffer; 

 C方式:

     FILE * pFile;

     long lSize;

     char * buffer;

     size_t result; 

     pFile = fopen ("test.txt", "rb" );

     if (pFile==NULL)

     {

         fputs ("File error",stderr);

         exit ();

     } 

     fseek (pFile ,  , SEEK_END);

     lSize = ftell (pFile);

     rewind (pFile); 

     buffer = (char*) malloc (sizeof(char)*lSize);

     if (buffer == NULL)

     {

         fputs ("Memory error",stderr);

         exit ();

     } 

     result = fread (buffer,,lSize,pFile);

     if (result != lSize)

     {

         fputs ("Reading error",stderr);

         exit ();

     } 

     printf("%s", buffer);  

     fclose (pFile);

     free (buffer);