Task model
- C course
- Beginner
- Lesson 83/116
- 6 min
Design the Task struct and array.
Project: To-do CLI
In this 5-lesson project you'll build a to-do list CLI app. Each lesson adds one piece, and by the final lesson you'll have a complete app.
You'll use:
struct Taskfor the task modeladd_task,list_tasks,complete_taskfunctions- an array holding tasks and a
countcounter strcpyto copy titles
Ready? Let's start.
Task array
To handle many tasks we use an array of struct Task. A count variable tracks how many tasks have been added.
struct Task tasks[10];
int count = 0;
/* tasks[count] is the next free slot */This structure lets us add, list and complete tasks. The array has a fixed size (10); count marks the used part.
Practice Create the first task and print it
Define struct Task with fields: int id, char title[50], int done. In main create a task with struct Task t = {1, "Shopping", 0};. Print the fields with printf("%d %s %d\n", t.id, t.title, t.done);. Output should be 1 Shopping 0.
Starter code
#include <stdio.h>
#include <string.h>
/* struct Task definition: id, title (50 chars), done fields */
int main(void) {
/* create a task and print id, title, done fields */
return 0;
}Sample solution
#include <stdio.h>
#include <string.h>
struct Task {
int id;
char title[50];
int done;
};
int main(void) {
struct Task t = {1, "Shopping", 0};
printf("%d %s %d\n", t.id, t.title, t.done);
return 0;
}Expected output
1 Shopping 0
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 How is struct Task defined?
- int struct Task { };
- Task { int id; char title[50]; int done; }
- struct Task = (id, title, done)
- struct Task { int id; char title[50]; int done; }; Correct answer
Explanation: The struct keyword, type name and braces with fields define a struct.
2 Field access
struct Task t;
t.____ = 1; /* task number */struct Task t;
t.id = 1; /* task number */Explanation: A dot accesses a struct field.
3 Match struct concepts
| Term | Meaning |
|---|---|
struct Task |
task structure |
t.id |
id field |
t.title |
title field |
t.done |
status field |