#include?
#include?
#include?
#include????//設備控制函數
#include?
#include?
#include???//聲卡的結構及定義
#include????//串口的結構及定義
?
#define?LENGTH?20????????//20秒
#define?RATE?48000??????//采樣頻率：48000...11025
#define?SIZE?16????????//樣本數據位
#define?CHANNELS?2????//1表示單聲道，2表示立體聲
#define?RSIZE?8??????//數據大小，一個字節
?
struct?fhead?
{?
????unsigned?char?a[4];
????long?int?b;?
????unsigned?char?c[4];?
????unsigned?char?d[4];
????long?int?e;?
????short?int?f;?
????short?int?g;?
????long?int?h;?
????long?int?i;?
????short?int?j;?
????short?int?k;?
????unsigned?char?p[4];?
????long?int?q;?
}wavehead;?

int?main（void）?
{?
	int?fd_dev_r;
????????int?fd_dev_w;?
	int?fd_f;?
	int?argstatus;?
	char?choice;?
	int?i;?
	unsigned?char?buf[RSIZE];?
	wavehead.a[0]=‘R‘;?
	wavehead.a[1]=‘I‘;?
	wavehead.a[2]=‘F‘;?
	wavehead.a[3]=‘F‘;??//RIFF資源交換標志
	wavehead.b=LENGTH*RATE*CHANNELS*SIZE/8-8;????//從下一個地址開始到文件尾的總字節數==總字節數減去開頭8個字節
	wavehead.c[0]=‘W‘;?
	wavehead.c[1]=‘A‘;?
	wavehead.c[2]=‘V‘;?
	wavehead.c[3]=‘E‘;??????//文件格式:?WAVE
	wavehead.d[0]=‘f‘;?
	wavehead.d[1]=‘m‘;?
	wavehead.d[2]=‘t‘;?????//波形格式標志：fmt
	wavehead.d[3]=‘?‘;?
	wavehead.e=16;?????????//16bit的數據表示一個量化結果--PCM技術
	wavehead.f=1;??????????//1表示有壓縮的編碼
	wavehead.g=CHANNELS;???//通道數
	wavehead.h=RATE;???????//采樣頻率
	wavehead.i=RATE*CHANNELS*SIZE/8;?????//Byte率=采樣頻率*音頻通道數*每次采樣得到的樣本位數/8
	wavehead.j=CHANNELS*SIZE/8;?????????//塊對齊=通道數*每次采樣得到的樣本位數/8
	wavehead.k=SIZE;????????????????????//每次采樣得到的樣本位數：16
	wavehead.p[0]=‘d‘;?
	wavehead.p[1]=‘a‘;?
	wavehead.p[2]=‘t‘;?
	wavehead.p[3]=‘a‘;????????????????//一個標志：data
	wavehead.q=LENGTH*RATE*CHANNELS*SIZE/8;???//Wav文件實際音頻數據所占的大小
	fd_dev_r=open（“/dev/dsp“O_RDONLY0777）;??//打開聲卡設備，聲卡數字采樣和數字錄音設備?用于播放聲音和錄音
	if（fd_dev_r<0）?
	{?
	???perror（“You?Con‘t?open?/dev/dsp?device“）;?
???????return?1;?
	}?

	if（ioctl（fd_dev_rSNDCTL_DSP_SYNCNULL）==-1）?
	??perror（“SNDCTL_DSP_SYNC“）;?
	/*設置bit*/
	arg=SIZE;?
	status=ioctl（fd_dev_rSNDCTL_DSP_SETFMT&arg）;?
	if（status==-1）?
	{?
		perror（“You?Con‘t?set?SNDCTL_DSP_SETFMT“）;??
		return?1;??
	}?
	/*設置聲道*/
	arg=CHANNELS;?
	status=ioctl（fd_dev_rSNDCTL_DSP_CHANNELS&arg）;?
	if（status==-1）?
	{
		perror（“You?Con‘t?