name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <iostream.h>
void main(void)
{
cout << "About to sound the speaker.../n";
asm
{
MOV AX,0x0200
MOV DL,7
INT 0x21
};
cout << "Done../n";
}
本文介绍了一个简单的C++程序,该程序通过内嵌汇编指令来控制扬声器发出声音。具体实现方式为:定义一个main函数,在其中使用cout输出提示信息,接着通过汇编指令设置寄存器并调用INT 0x21中断服务程序以控制扬声器工作。

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