nosound c By:Deepak mehta
nosound function turn off the PC speaker.
Declaration : void nosound();
C programming code for nosound
#include<dos.h>
main()
{
sound(400);
delay(1000);
nosound();
return 0;
}
kbhit in c
kbhit in c: kbhit function is used to determine if a key has been pressed or not. To use kbhit function in your program you should include the header file "conio.h". If a key has been pressed then it returns a non zero value otherwise returns zero. Declaration : int kbhit(); C programming code for kbhit #include <stdio.h> #include <conio.h> main() { while (!kbhit()) printf("You haven't pressed a key.\n"); return 0; } As long as in the above program user doesn't presses a key kbhit() return zero and (!0) i.e. 1 the condition in while loop is true and "You haven't pressed a key." will be printed again and again. As a key is pressed from the keyboard the condition in while loop become false as now kbhit() will return a non-zero value and ( !(non-zero) = 0), so the control will come out of the while loop.
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