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+====== sound ======
+<code c>
+void sound( unsigned int );
+</code>
+===== description of sound =====
+Producessound of a specified frequency.\\
+mostly used for adding music to c program\\
+random values and delay needed to make some strange sounds.\\
+<code c>
+#include<stdio.h>
+#include<dos.h>
+int main(void)
+{
+   int i;
+   for ( i = 42 ; i <= 4200 ; i ++  )
+   {
+      i = i + rand(100);
+      sound(i);
+      delay(50);
+   }
+   nosound();
+   return 0;
+}
+</code>
+==== output of sound c example ====
+    Strange sounds

on the occasion of the current invasion of Russia in Ukraine