Added multiplication of two numbers

We are using an easy to implemented but extremely slow algorithm to
compute the multiplication of two numbers of size n.

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

2 files changed, 20 insertions, 0 deletions

diff --git a/number.cpp b/number.cpp
index 57dbcae..fcc6dc0 100644
--- a/number.cpp
+++ b/number.cpp
@@ -92,6 +92,18 @@ number::operator+(const number &n) const
     return result;
 }
 
+number
+number::operator*(const number &n) const
+{
+    number result;
+
+    for (number i; i < n; ++i) {
+        result += *this;
+    }
+
+    return result;
+}
+
 /* }}} */
 /* Comparison operators {{{ */
 
diff --git a/number.h b/number.h
index c905287..189011d 100644
--- a/number.h
+++ b/number.h
@@ -33,6 +33,14 @@ public:
     number operator+(const number &n) const;
 
     /**
+     * \brief Return the result of the multiplication of a number and this
+     * number.
+     *
+     * \param n The number to multiply with this number.
+     */
+    number operator*(const number &) const;
+
+    /**
      * \brief Tells whether the number passed as parameter is strictly less
      * than this number.
      *