2 files changed, 33 insertions, 0 deletions
diff --git a/number.cpp b/number.cpp
index c337a34..57dbcae 100644
--- a/number.cpp
+++ b/number.cpp
@@ -149,6 +149,25 @@ number::operator!=(const number &n) const
 }
 
 /* }}} */
+/* Assignment operators {{{ */
+
+number &
+number::operator+=(const number &n)
+{
+    *this = *this + n;
+
+    return *this;
+}
+
+number &
+number::operator++()
+{
+    *this = *this + 1;
+
+    return *this;
+}
+
+/* }}} */
 
 std::ostream &
 operator<<(std::ostream &os, const number &n)
diff --git a/number.h b/number.h
index 252428a..c905287 100644
--- a/number.h
+++ b/number.h
@@ -11,6 +11,8 @@ public:
     number(const number &) = default;
     number(number &&) = default;
 
+    number &operator=(const number &) = default;
+
     number(std::uint32_t);
 
     /**
@@ -78,6 +80,18 @@ public:
      */
     bool operator!=(const number &n) const;
 
+    /**
+     * \brief Add a number to this number.
+     *
+     * \param n Number to add to this number.
+     */
+    number &operator+=(const number &n);
+
+    /**
+     * \brief Increment this number.
+     */
+    number &operator++();
+
 private:
      /* First item is the least significant. */
     std::list<std::uint32_t> _operands;