code: add Maximum of numbers

main.cpp

@@ -10,6 +10,7 @@ int main()
     cout << "A + B = " << a + b << '\n'
         << "A - B = " << a - b << '\n'
         << "A * B = " << a * b << '\n'
-        << "A : B = " << a / b << '\n';
+        << "A : B = " << a / b << '\n'
+        << "MAX(A, B) = " << max(a, b) << '\n';
     return 0;
 }