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+====== nosound ======
+<code c>
+void nosound( void );
+</code>
+===== description of nosound =====
+turn off the PC speaker.
+<code c>
+#include<stdio.h>
+#include<dos.h>
+int main(void)
+{
+   sound(400);
+   delay(1000);
+   nosound();
+   return 0;
+}
+</code>
+==== output of nosound c example ====
+    silence :D

on the occasion of the current invasion of Russia in Ukraine