function <em>half(x)</em> which has return type <em>integer</em> and accept an <em>integer </em>type parameter <em>'x'</em> and return the an <em>integer </em>value in variable <em>'a' </em>which is closest to <em>half</em> that of the parameter '<em>x'</em>.
check to see if you have headphones or snything plug in to it that might take the sound if not try restarting your computer, or your speakers are broken with water damage or over use