集合怎么写? ( 积分: 50 )

我的集合定义:
1.
typedef std::set <char, '$', 'Z'> CharSet;
//不对在哪啊?
2.
typedef std::set <char> TCharSet;
TCharSet CharSet;
CharSet.Clear();
CharSet<<'A';
//错在哪里?该怎么写?'operator<<' not implemented in type 'TCharSet' for arguments of type 'char'

我的集合定义:
1.
typedef std::set <char, '$', 'Z'> CharSet;
//不对在哪啊?
2.
typedef std::set <char> TCharSet;
TCharSet CharSet;
CharSet.Clear();
CharSet<<'A';
//错在哪里?该怎么写?'operator<<' not implemented in type 'TCharSet' for arguments of type 'char'

通过:
#include <sysset.h>
typedef Set <char, '$', 'Z'> TCharSet;
CharSet.Clear();
CharSet<<'$'<<'%'<<'*'<<'-'<<'0'<<'1'<<'2'<<'3'<<'4'<<'5'<<'6'<<'7'<<'8'<<'9'<<'0';
CharSet<<'A'<<'B'<<'C'<<'D'<<'E'<<'F'<<'G'<<'H'<<'I'<<'J'<<'K'<<'L'<<'M'<<'N';
CharSet<<'O'<<'P'<<'Q'<<'R'<<'S'<<'T'<<'U'<<'V'<<'W'<<'X'<<'Y'<<'Z';