Try to init linkedlist example and testing the node

Updated to test util

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/run

@@ -1,4 +1,5 @@
 #!/bin/bash
 
-gcc work1.c -o work1
-./work1
+rm -r work1
+
+gcc work1.c -o work1 && ./work1

tests/runLinkedlist

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+rm -r linkedlist
+
+gcc linkedlist.c -o linkedlist
+
+./linkedlist

tests/util.c

@@ -0,0 +1,14 @@
+#include "stdio.h"
+
+void print(char *text) {
+    printf(text);
+}
+
+void println(char *text) {
+    newline();
+    print(text);
+}
+
+void newline() {
+    printf("\n");
+}

tests/work1.c

@@ -1,6 +1,7 @@
 #include "stdio.h"
 #include "string.h"
 #include "stdlib.h"
+#include "util.c"
 
 struct person_tag
 {
@@ -60,9 +61,12 @@ int main()
     
     display_menu();
 
-    scanf("\nenter the option: ", selected);
 
-    menu(selected);
+    newline();
+
+    // scanf("\nenter the option: ", selected);
+
+    // menu(selected);
 
     return 0;
 }
@@ -105,3 +109,27 @@ void display_menu() {
     printf("\n");
     read_file("./../note/section1.txt");
 }
+
+void display_students() {
+    
+}
+
+void search_student() {
+
+}
+
+void find_maximum() {
+
+}
+
+void find_failed() {
+
+}
+
+void update_file() {
+
+}
+
+void exit_program() {
+    println("Goodbye...");
+}