文件操作 fstream

 ifstream infile("c://cmd.txt");
 if( !infile )
 {
  cerr << "error: unable to open input file!/n" ;
  return 1;
 }

 infile.seekg(0, ios::end);
 int iFileLen = infile.tellg();
 cout << "File Length:" << iFileLen <<endl;
 char * pBuff = new char[iFileLen+1];
 memset( pBuff, 0, iFileLen+1 );
 infile.seekg( 0, ios::beg );
 infile.read( pBuff, iFileLen );
 cout << pBuff << endl;
 infile.close();  return 0;

读文件，然后cout到标准输出中。。。。