VC 用发音函数Beep()播放简谱音乐

2019-11-06 07:42:42

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Win32 API中有个非常有意思的发音函数Beep()，可以用它在扬声器上播放简单的音调，如果按简谱来设置播放的内容，就可以播放一些简单的音乐了。

函数原型：

[cpp] view plain copyBOOL WINAPI Beep( __in DWord dwFreq, __in DWORD dwDuration );

函数说明：

第一个参数表示频率，用Hz为单位，可以在0x25到0x7FFF之间。

第二个参数表示持续的时间，以毫秒为单位。

与这个函数类似的是：

BOOL WINAPI MessageBeep(

__in UINT uType

);

这个函数使用要广泛的多。相当多的程序在MessageBox()之前都会调用MessageBeep()来发出一些提示音（实际上是播放系统音乐文件）。

可供选择的参数有：

MB_ICONASTERISK0x00000040L	SystemAsterisk
MB_ICONEXCLAMATION0x00000030L	SystemExclamation
MB_ICONHAND0x00000010L	SystemHand 警告音
MB_ICONQUESTION0x00000020L	SystemQuestion
MB_OK0x00000000L	SystemDefault

再附上本人收藏的几个用Beep()播放音乐的程序，虽然音质无法与音频文件媲美，但做个小小的娱乐还是可以的：

[cpp] view plain copy// 播放生日快乐 #include <windows.h> void main(void) { unsigned FREQUENCY[] = {392,392,440,392,523,494, 392,392,440,392,587,523, 392,392,784,659,523,494,440, 689,689,523,587,523}; unsigned DELAY[] = {375,125,500,500,500,1000, 375,125,500,500,500,1000, 375,125,500,500,500,500,1000, 375,125,500,500,500,1000}; int i; for (i = 0; i < 25; i++) { Beep(FREQUENCY[i], DELAY[i]); } } // 播放小酒窝 #include<iostream.h> #include<windows.h> enum fy{ d1 = 262, d1_ = 277, d2 = 294, d2_ = 311, d3 = 330, d4 = 349, d5 = 392, d5_= 415, d6 = 440, d6_= 466, d7 = 494, z1 = 523, z1_ = 554, z2 = 578, z2_ = 622, z3 = 659, z4 = 698, z4_ = 740, z5 = 784, z5_ = 831, z6 = 880, z6_ = 932, z7 = 988, g1 = 1046, g1_ = 1109, g2 = 1175, g2_ = 1245, g3 = 1318, g4 = 1397, g4_ = 1480, g5 = 1568, g5_ = 1661, g6 = 1760, g6_ = 1865, g7 = 1976, yaya = 0 }; struct yf { enum fy s; int t; }; int main() { int n = 0; struct yf a[1000]={{z3,125},{z3,50},{z4,100},{z3,50},{z2,50}, //5 {z2,125},{z2,50},{z5,100},{z2,50},{z1,50}, //10 {z1,125},{z1,50},{z6,100},{z5,100}, //14 {z3,125},{z4,25},{z3,25},{z2,100},{z2,100}, //19 {z3,125},{z3,50},{z4,100},{z5,50},{z3,50}, //24 {z5,125},{z5,50},{g2,100},{z7,50},{g1,50}, //29 {g1,200},{g1,50},{z7,50},{z6,50},{z7,50}, //34 {g1,125},{z7,50},{g1,200}, //37 {g1,50},{z7,50},{g1,50},{z7,50},{g1,100},{z3,50},{z5,50}, //44 {z5,250},{z6,50},{z7,50}, //47 {g1,50},{z7,50},{g1,50},{z7,50},{g1,100},{g2,100},{g3,100}, //54 {g3,300},{z6,50},{z7,50}, //57 {g1,50},{z7,50},{g1,50},{z7,50},{g1,100},{g3,100}, //63 {z7,50},{z6,50},{z7,50},{z6,50},{z7,50},{z5,50},{z5,50},{g1,50}, //71 {g1,200},{g3,75},{g4,25},{g4,50},{g3,50}, //76 {g2,200},{yaya,50},{z5,50},{g1,50},{g2,50}, //81 {g3,50},{g1,50},{g1,50},{z5,50},{z5,100},{z5,50},{g3,50}, //88 {g2,50},{g3,50},{g2,50},{g1,50},{z5,50},{z5,50},{z6,50},{z7,50}, //96 {g1,50},{z6,50},{z6,50},{z3,50},{z3,100},{yaya,50},{z7,50}, //103 {g1,50},{z7,50},{g1,50},{g2,50},{z6,50},{z5,50},{z5,100}, //110 {z6,100},{z5,50},{z6,50},{z7,100},{g3,50},{g4,50}, //116 {g3,50},{g4,50},{g3,50},{g2,50},{g2,50},{g1,100},{z5,50}, //123 {z5,50},{z4,50},{z4,50},{g1,50},{g1,50},{g3,50},{g3,50},{g1,50}, //131 {g2,200},{yaya,50},{z5,50},{g1,50},{g2,50}, //136 {g3,50},{g1,50},{g1,50},{z5,50},{z5,100},{z5,50},{g3,50}, //143 {g2,50},{g3,50},{g2,50},{g1,50},{z5,50},{z5,50},{z6,50},{z7,50}, //151 {g1,50},{z6,50},{z6,50},{z3,50},{z3,100},{z3,50},{z7,50}, //158 {g1,50},{z7,50},{g1,50},{g2,50},{z6,50},{z5,50},{z5,100}, //165 {z6,50},{z7,50},{g1,50},{g2,100},{g3,50},{g4,50}, //171 {g3,50},{g4,50},{g2,50},{g1,50},{g2,50},{g1,50},{g1,100}, //178 {g2,50},{g1,50},{g2,50},{z6,50},{g1,100},{g2,50},{g1,50}, //185 {g1,400}, //186 {g2,50},{g1,50},{g2,50},{z6,50},{z7,100},{z7,50},{g1,50}, //193 {g1,400}, //194 }; struct yf *atop; atop = a; n = 194; while(n--) { Beep(atop->s,atop->t*5); atop++; } return 0; }