refresh

du3/program.c

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 #define STACK_SIZE 10
 
 
@@ -10,6 +11,12 @@ struct stack {
 };
 
 void push_stack(struct stack* stack, float value) {
+    if (stack->size >= STACK_SIZE) {
+        printf("Error!\n");
+        exit(1);
+    }
+    stack->values[stack->size] = value;
+    stack->size++;
     
 }