Expected ')' before ';' token Error
Well, for example for doesn't have four parts but three

for (int i = 0; i ; 256; i++) // =&gt; for (int i = 0; i &lt; 256; ++i)


Next one doesn't look much better:

for (int i = 255; i (&amp;gt);= 0; --i) // =&gt;  for (int i = 255; i &gt;= 0; --i)


There might be more, but these are really obvious. Like you copied it from some website with some characters translated into the html entities.