added code

slides/exemples/table_list.c

+#include <stdio.h>
+
+struct key_t {
+    int k;
+};
+
+struct value_t {
+    int v;
+};
+
+struct key_value_t {
+    struct key_t key;
+    struct value_t value;
+};
+
+struct elem {
+    struct key_value_t kv;
+    struct elem *next;
+};
+
+struct table {
+    struct elem *head;
+};
+
+struct value_t *sequential(struct table tab, struct key_t key) {
+    struct elem *e = tab.head;
+    while (e != NULL) {
+        if (e->kv.key.k == key.k) {
+            return &(e->kv.value);
+        }
+        e = e->next;
+    }
+    return NULL;
+}
+
+int main() {
+    int w = 5;
+    /*int *v = NULL;*/
+    int *v = &w;
+    printf("%d\n", *v);
+}