feat: add stack

test/stack/s1.c

@@ -0,0 +1,23 @@
+#include <assert.h>
+#include <stdlib.h>
+
+#include "../../stack/mystack.h"
+
+
+void test_s1(void) {
+	stack_s *stack = stack_new(32, sizeof(int));
+	int num = 10;
+	stack_push(stack, &num);
+
+	num = 13;
+	stack_push(stack, &num);
+
+	int *rv = (int *)stack_top(stack);
+	assert(*rv == 13);
+	free(rv);
+
+	rv = (int *)stack_pop(stack);
+	assert(*rv == 13);
+	free(rv);
+
+	stack_free(stack);