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C/C++ Source or Header  |  1991-08-05  |  212 b   |  11 lines
  1. /* SLEEP.C --- p. 673 */
  2.  #include <dos.h>
  3.  main()
  4.  {
  5.     unsigned duration;
  6.     printf("Enter duration of 440-Hz tone (in seconds); ");
  7.     scanf(" %u", &duration);
  8.     sound(440);
  9.     sleep(duration);
  10.     nosound();
  11. }