calk added

main/SC/head.h

@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define N 6
+
+typedef struct Stack {
+  double x;
+  struct Stack *next;
+} Stack;
+
+Stack get(Stack *l, int n);
+Stack *add_head(Stack *l, double x);
+void stack_print(Stack *l);
+int len(Stack *l);
+Stack *del_head(Stack *l);