代码如下：
#include <cstdlib>
#include <iostream>
#include <stdio.h>
#include <dos.h>
#include <windows.h>

using namespace std;

bool IsNT()//判断是NT
    {
        bool blNT;
        DWORD dwVersion=GetVersion();
        if(dwVersion<0x80000000)   //NT
                blNT=true;
        else blNT=false;
        return blNT;
}
void PlayWarnningSound(int delay,int freq)
{
        const int scale=1193180   ;
        WORD freqTemp =(WORD)(scale/freq)   ;

        if (IsNT())       //NT,2000   and   XP
        {
                _beep(freq,delay);
                return   ;
        }
        asm
        (
                "in    al,61h"
                "or    al,3 "
                "out   61h,al"
                "mov   al,0xb6"
                "out   43h,al"
                "mov   ax, freqTemp"
                "out   42h,al"
                "mov   al,ah"
                "out   42h,al"
        );
        Sleep(delay);
        asm          //关闭声音
        (
                "in   al,0x61"
                "and  al,0xfc"
                "out  61H,al"
        );
}
int main(void)
{
    _beep(2000,50);
    system("PAUSE");
    PlayWarnningSound(150,120);
    PlayWarnningSound(150,300);
    system("PAUSE");
    return 0;
}
------------
编译后提示：
  Assembler messages:
                                     too many memory references for `in'
                                     too many memory references for `in'
D:\C++\DEV-CPP\Examples\Makefile.win [Build Error]  [main.o] Error 1

how to solve this problem? can you provide your solution(using assembly) ?

返回值


我 可以理解这个 函数的 参数是int把

do not know your meaning,what do you want to express?