0001 #define  N_CHAR  (0x80 - 0x20) //仅以可打印字符为例
0002 struct HuffChar { //Huffman（超）字符
0003    char ch; unsigned int weight; //字符、频率
0004    HuffChar ( char c = '^', unsigned int w = 0 ) : ch ( c ), weight ( w ) {};
0005    HuffChar ( HuffChar const & hc ) : ch( hc.ch ), weight( hc.weight ) {};
0006    // 比较器、判等器（各列其一，其余自行补充）
0007    bool operator< ( HuffChar const& hc ) { return weight > hc.weight; } //此处故意大小颠倒
0008    bool operator== ( HuffChar const& hc ) { return weight == hc.weight; }
0009 };