How to make computer beep through C

#include 
int main(void)
{
    printf("\a");
    return 0;
}

PROGRAM 2 :

#include             /*  beep1.c  */
#include 
#include 

int main(void)
{
    int i, j, speed = 2000;

    printf("1 \a \n");      /* works with just stdio.h */
     Sleep(1000);            /* need windows.h */
                      /* must wait before dings or I won't get ding
                         I guess 'cause it's working so hard to make it: ) */

    printf("2  \n");
    putchar(0x07);          /* works with just stdio.h */
    Sleep(1000);

    printf("3  \n");
    Beep(2750, speed);      /* need windows.h */
    Sleep(1000); 
    
    printf("4  \n");
    _beep(2750, speed);     /* need stdlib.h */
    _sleep(1000);           /* need stdlib.h */


    /* I get the same Beep for all of these */

    for(i = 400; i <= 2000; i += 400 ) {
      for(j = 400; j <= 2000; j += 400) {
        printf("Beep(%d, %d)  \n", i, j);
        Beep(i, j);
        /* Beep(200, speed); */
        Sleep(1000);
      }
    }
    return 0;
}
/*
Here's where they come from in my mingw - includes directory:
-----
winbase.h
BOOL WINAPI Beep(DWORD,DWORD);
-----
stdlib.h
/ *
 * NOTE: Officially the three following functions are obsolete. The Win32 API
 *       functions SetErrorMode, Beep and Sleep are their replacements.
 * /
_CRTIMP void __cdecl _beep (unsigned int, unsigned int);
_CRTIMP void __cdecl _seterrormode (int);
_CRTIMP void __cdecl _sleep (unsigned long);

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