diff --git a/du3/program.c b/du3/program.c
index 740da66..aa34cbd 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -20,6 +20,8 @@ void push_stack(struct stack* mystack, float value)
 
 int switch_operators(const char input[])
 {
+	if(strlen(input)==1)
+	{
     switch (input[0])
     {
     case '+':
@@ -34,10 +36,9 @@ int switch_operators(const char input[])
     case '/':
         return -1;
         break;
-    default:
-        return 1;
-        break;
     }   
+	}
+	return 1;
 }
 
 float pop_stack(struct stack* mystack,const char input[])