Update README.md

Missed a point, added.

README.md

@@ -5,7 +5,7 @@ WebGCC
 Introduction
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-Welcome to my little project called WebGCC, a barebones PHP based web interface for the GNU Compiler Collections.
+Welcome to my little project called WebGCC, a barebones PHP based web interface for the GNU Compiler Collections, that lets you test C and C++ codes online.
 
 
 Features