Sound Function in C

#include<dos.h>
main()
{
int a;
for ( a = 200 ; a <= 1000 ; a = a + 20 )
{
sound(a);
delay(25);
}
nosound();
return 0;
}

Sound function produces the sound of a specified frequency. Used for adding music to c program, try to use some random values in loop, vary delay and enjoy.