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#include<reg51.h>
#include<intrins.h>
#define led_8 P0
sbit speaker=P2^7;
unsigned char code yp[]={70,70,63,70,53,56,70,70,63,
70,47,53,70,70,35,42,53,56,
63,39,39,42,53,47,53,-1}; //音譜表
unsigned int code yl[]={225,75,300,300,300,600,225,75,300,300,300,600,225,75,
300,300,300,300,300,475,75,300,300,300,600,-1}; //每個(gè)音對(duì)應(yīng)的演奏長(zhǎng)度
void ys(unsigned int x)
{
while(x--);
}
void music()
{
unsigned int m=0,n,s;
led_8=0xff;
while(yp[m]!=-1||yl[m]!=-1) //沒(méi)遇到結(jié)束符-1則執(zhí)行下列音樂(lè)段
{
for(n=0;n<yl[m];n++)
{
speaker=~speaker; //揚(yáng)聲器按音譜發(fā)音
for(s=0;s<yp[m];s++);
}
ys(10); //每個(gè)音符的演奏長(zhǎng)度
led_8=~led_8; //8只LED燈閃爍
m++; //指向下一個(gè)音符與演奏時(shí)間值
}
}
void main()
{
while(1)
{
music();
ys(500);
}
}

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