2 files changed, 16 insertions, 4 deletions
diff --git a/addon.c b/addon.c
index b6ddc61..6e6c232 100644
--- a/addon.c
+++ b/addon.c
@@ -6,7 +6,7 @@
 #include "rc.h"
 #include "addon.h"
 
-void b_add(char **av) {
+void b_sum(char **av) {
 	long sum = 0;
 
 	while (*++av)
@@ -14,3 +14,12 @@ void b_add(char **av) {
 	fprint(1, "%ld\n", sum);
 	set(TRUE);
 }
+
+void b_prod(char **av) {
+	long sum = 1;
+
+	while (*++av)
+		sum *= atol(*av);
+	fprint(1, "%ld\n", sum);
+	set(TRUE);
+}
diff --git a/addon.h b/addon.h
index b4a207b..4a69375 100644
--- a/addon.h
+++ b/addon.h
@@ -16,13 +16,16 @@
    argument is followed by a NULL pointer.
 
    Builtins report their exit status using set(TRUE) or set(FALSE).
-  
+
 */
 
 #if RC_ADDON
 
-#define ADDONS	{ b_add,	"+" },
+#define ADDONS \
+	{ b_sum,	"+" }, \
+	{ b_prod, "x" },
 
-extern void b_add(char **av);
+extern void b_sum(char **av);
+extern void b_prod(char **av);
 
 #endif