read ()

 

read

语法:

istream &read( char *buffer, streamsize num );

函数read()用于输入流，在将字符放入buffer 之前从流中读取num 个字节。如果碰到EOF，read()中止，丢弃不论多少个字节已经放入。例如：

    struct {      int height;      int width;    } rectangle;        input_file.read( (char *)(&rectangle), sizeof(rectangle) );    if( input_file.bad() ) {      cerr << "Error reading data" << endl;      exit( 0 );    }