diff --git a/du3/program.c b/du3/program.c
index d5ec218..fda7bb5 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -37,19 +37,23 @@ void push_stack (struct stack* s, float value) {
 
 float pop_stack(struct stack* s) {
     if (s->size <= 0) {
-        prinf("Erroe!\n");
+        printf("Erroe!\n");
         exit(1);
     }
     s->size--;
-    return 
+    return s->values[s->size];
 }
 
-void print_stack(struct stack* s) {
-
+void print_stack(struct stack* stack) {
+    for (int i = 0; i<stack->size; i++) {
+        printf("%.2f", stack->values[i]);
+    }
+    printf("\n");
 }
 
 void destroy_stack (struct stack* s) {
-
+    free(s->values);
+    free(s);
 }
 
 int main() {