1 #include <stdio.h>
2
3 class Task {
4 public:
5 int id;
6 Task *next;
Task(int i,Task * n)7 Task(int i, Task *n):
8 id(i),
9 next(n)
10 {}
11 };
12
13
main(int argc,char const * argv[])14 int main (int argc, char const *argv[])
15 {
16 Task *task_head = NULL;
17 Task *task1 = new Task(1, NULL);
18 Task *task2 = new Task(2, NULL);
19 Task *task3 = new Task(3, NULL); // Orphaned.
20 Task *task4 = new Task(4, NULL);
21 Task *task5 = new Task(5, NULL);
22
23 task_head = task1;
24 task1->next = task2;
25 task2->next = task4;
26 task4->next = task5;
27
28 int total = 0;
29 Task *t = task_head;
30 while (t != NULL) {
31 if (t->id >= 0)
32 ++total;
33 t = t->next;
34 }
35 printf("We have a total number of %d tasks\n", total);
36
37 // This corresponds to an empty task list.
38 Task *empty_task_head = NULL;
39
40 Task *task_evil = new Task(1, NULL);
41 Task *task_2 = new Task(2, NULL);
42 Task *task_3 = new Task(3, NULL);
43 task_evil->next = task_2;
44 task_2->next = task_3;
45 task_3->next = task_evil; // In order to cause inifinite loop. :-)
46
47 return 0; // Break at this line
48 }
49