Task model

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 Task for the task model
add_task, list_tasks, complete_task functions
an array holding tasks and a count counter
strcpy to 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.

Exercise 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.

Show example 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;
}

Test yourself

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; };
Show answer

struct Task { int id; char title[50]; int done; }; — The struct keyword, type name and braces with fields define a struct.

Field access

struct Task t;
t.____ = 1;  /* task number */

Show answer

struct Task t;
t.id = 1;  /* task number */

Match struct concepts

struct Task

task structure
t.id

id field
t.title

title field
t.done

status field

Next lesson: Adding tasks

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