话不多说，上代码：

#include <windows.h>

#include <iostream>

#include <map>

using namespace std;

const int DO = 261;

const int RE = 293;

const int MI = 329;

const int FA = 349;

const int SO = 392;

const int LA = 440;

const int TI = 493;

const int DO_ = 130;

const int RE_ = 147;

const int MI_ = 165;

const int FA_ = 174;

const int SO_ = 186;

const int LA_ = 220;

const int TI_ = 247;

int frequency(char note){

    static map<const char,int> table;

    if(table.size() == 0){

        table['1'] = DO;

        table['2'] = RE;

        table['3'] = MI;

        table['4'] = FA;

        table['5'] = SO;

        table['6'] = LA;

        table['7'] = TI;    

        table['c'] = DO_;

        table['d'] = RE_;

        table['e'] = MI_;

        table['f'] = FA_;

        table['g'] = SO_;

        table['a'] = LA_;

        table['b'] = TI_;

    }

    return table.find(note) -> second;

}

class music{

    private:

        string notes;

        int tenuto;

    public:

        music(string &song , int tenuto_) { notes = song; tenuto = tenuto_; play(notes.end(),tenuto);}

        void play(string::iterator it,int duration );

};

void music::play(string::iterator it, int duration){

    char note = *it;

    if( it == notes.begin() )

        return;

    if( note == '-')

        play( it - 1, duration + tenuto);

    else {

        if( isalnum(note) ) {

            play( it - 1, 0);

            Beep(frequency(note), tenuto + duration);

        } else

            play( it - 1, duration);

    }

}

 string bee = "\

 5 3 3 - | 4 2 2 - | 1 2 3 4 | 5 5 5 - | \

 5 3 3 - | 4 2 2 - | 1 3 5 5 | 3 3 3 - | \

 2 2 2 2 | 2 3 4 - | 3 3 3 3 | 3 4 5 - | \

 5 3 3 - | 4 2 2 - | 1 3 5 5 | 1 3 1 - |  \

 ";

 string happynewyear = "\

						  1 1 1 - g - | 3 3 3 - 1 - | 1 3 5 - 5 - | \

						  4 3 2 - - - | 2 3 4 - 4 - | 3 2 3 - 1 - | \

						  1 3 2 - g - | b 2 1 - - - | \

						  ";

 int main()

 {

	 music m(bee, 300);

	 music m2(happynewyear, 200);

	 return 0;

 }