Creating a Simple To-Do List in C
Creating a Simple To-Do List in C
Introduction
A to-do list is a common application that helps users keep track of tasks they need to complete. In this guide, we'll walk you through the process of creating a simple to-do list in C. We'll explain how it works, and provide sample code to illustrate its usage.
Designing the To-Do List
Our simple to-do list will be a console application that allows users to add tasks, mark tasks as completed, and view their to-do list.
Sample Code
Let's explore the sample code for creating the simple to-do list in C:
#include <stdio.h>
#include <stdbool.h>
// Maximum number of tasks
#define MAX_TASKS 10
// Structure to represent a task
struct Task {
char description[100];
bool completed;
};
int main() {
struct Task tasks[MAX_TASKS];
int taskCount = 0;
while (1) {
printf(`
----- To-Do List -----
`);
printf(`1. Add Task
`);
printf(`2. Mark Task as Completed
`);
printf(`3. View To-Do List
`);
printf(`4. Exit
`);
int choice;
printf(`Enter your choice (1-4): `);
scanf(`%d`, &choice);
switch (choice) {
case 1:
if (taskCount < MAX_TASKS) {
printf(`Enter task description: `);
scanf(` %[^
]`, tasks[taskCount].description);
tasks[taskCount].completed = false;
taskCount++;
} else {
printf(`To-Do List is full. Cannot add more tasks.
`);
}
break;
case 2:
printf(`Enter task number to mark as completed: `);
int taskNumber;
scanf(`%d`, &taskNumber);
if (taskNumber >= 1 && taskNumber <= taskCount) {
tasks[taskNumber - 1].completed = true;
printf(`Task marked as completed.
`);
} else {
printf(`Invalid task number.
`);
}
break;
case 3:
printf(`----- To-Do List -----
`);
for (int i = 0; i < taskCount; i++) {
printf(`%d. %s - %s
`, i + 1, tasks[i].description, tasks[i].completed ? `Completed` : `Not Completed`);
}
break;
case 4:
printf(`Exiting the program.
`);
return 0;
default:
printf(`Invalid choice. Please enter a number between 1 and 4.
`);
}
}
return 0;
}
Usage
To use the to-do list, follow these steps:
- Run the program.
- Choose options to add tasks, mark tasks as completed, view the to-do list, or exit.
- Follow the prompts to perform the selected action.
Conclusion
Creating a simple to-do list in C is a practical exercise that involves user input, arrays, structures, and decision-making with switch statements. This guide introduced the concept of a to-do list, explained how it works in C, and provided sample code to demonstrate its usage. As you continue your C programming journey, you can enhance this to-do list or create more advanced applications.