add comments to c++ impl

lab2/zad1/include/GF.hpp

@@ -50,6 +50,9 @@ public:
         return this->operator*(GF<N>(rhs));
     }
 
+    /*
+     * throws std::invalid_argument when dividing by 0
+     */
     GF<N> operator/(const GF<N> &rhs) const {
         if (rhs._value == 0) {
             throw std::invalid_argument("division by 0 is illegal");
@@ -117,7 +120,13 @@ public:
         return stream;
     }
 
+    /*
+    * returns the characteristic of this GF
+    */
     uint characteristic() const { return N; }
 
+    /*
+    * returns the value of this GF
+    */
     uint value() const { return _value; }
 };