Try to init linkedlist example and testing the node

tests/linkedlist.c

@@ -0,0 +1,73 @@
+#include "stdio.h"
+#include "stdlib.h"
+
+struct node {
+    int data;
+    struct node *next;
+};
+
+struct node *head = NULL;
+void add_first(int);
+void add_last(int);
+void traverse();
+void remove_first();
+void remove_last();
+int count = 0;
+void display_menu();
+
+int main(void) {
+    printf("Welcome!\n");
+
+    int selected, data;
+
+    while (1) {
+        if (count == 100) {
+            exit(EXIT_SUCCESS);
+        }
+
+        // show menu
+        display_menu();
+    }
+
+    printf("\nGoodbye!");
+    return 0;
+}
+
+void display_menu() {
+
+    printf("1. Add first element\n");
+    printf("2. Add last element\n");
+    printf("3. Traverse element\n");
+    printf("4. Remove first element\n");
+    printf("5. Remove last element\n");
+
+}
+
+void add_first(int element) {
+    // init node
+    struct node *node;
+
+    // allocate the node for linkedlist
+    node = (struct node*)malloc(sizeof(struct node));
+
+    // add the data into node
+    node->data = element;
+
+    // count the nodes, that added into data
+    count++;
+
+    // check the head, if null put the data into it
+    if (head == NULL) {
+        // replace the node into head
+        head = node;
+
+        // set the next of head into null
+        head->next = NULL;
+
+        // return or end this process
+        return;
+    }
+
+    node->next = head;
+    head = node;
+}

tests/runLinkedlist

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+#!/bin/bash
+
+rm -r linkedlist
+
+gcc linkedlist.c -o linkedlist
+
+./linkedlist