#include <stdio.h>
#include <stdlib.h>
#include <sys/io.h>


void main(int argc,char *argv[]){
        int num,i,j;
        char str[5],check_ch,err=0;

        if(argc != 2 ){
                printf("Please enter argument!!\n ex: ./beep 5\n");
                return ;
        }

        for (i=0;i<5;i++){
                if(argv[1][i] == '\0')
                        break;
                str[i] = argv[1][i];
        }
        for (j=0;j<i;j++){
                check_ch = str[j];
                if((check_ch < 48) || (check_ch > 57)){
            err=1;
            printf("Error!! Please enter the integer argument!!\n");
            return ;
        }
    }

    num=atoi(argv[1]);
    iopl(3);
    outb(0x4e, 0xa05);
    outb(0x04, 0xa06);
    outb(0x53, 0xa05);
    outb(0x20, 0xa06);
    sleep(num);

    outb(0x53, 0xa05);
    outb(0x00, 0xa06);
}