Added the addition of two numbers

We're using the grade school addition method to compute the sum of two
numbers of size n.

Signed-off-by: Olivier Gayot <og@satcom1.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/number.h b/number.h
index c508a81..ca5075e 100644
--- a/number.h
+++ b/number.h
@@ -9,6 +9,13 @@ public:
     number() = default;
 
     /**
+     * \brief Return the result of the addition of a number and this number.
+     *
+     * \param n The number to add to this number.
+     */
+    number operator+(const number &n) const;
+
+    /**
      * \brief Tells whether the number passed as parameter is strictly less
      * than this number.
      *