Todo list basic app

todo-list/main.c

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+#include <stdio.h>
+#include "tasks.h"
+
+int main() {
+    int numTasks = 0;
+    struct Task tasks[MAX_TASKS];
+
+    loadTasksFromFile(tasks, &numTasks);
+
+    int choice;
+    do {
+        printf("To-Do List Application\n");
+        printf("1. Add Task\n");
+        printf("2. View Tasks\n");
+        printf("3. Mark Completed\n");
+        printf("4. Save and Exit\n");
+        printf("Enter your choice: ");
+        scanf("%d", &choice);
+
+        switch (choice) {
+            case 1:
+                addTask(tasks, &numTasks);
+                break;
+            case 2:
+                viewTasks(tasks, numTasks);
+                break;
+            case 3:
+                markCompleted(tasks, numTasks);
+                break;
+            case 4:
+                saveTasksToFile(tasks, numTasks);
+                printf("Tasks saved. Exiting...\n");
+                break;
+            default:
+                printf("Invalid choice. Please try again.\n");
+        }
+    } while (choice != 4);
+
+    return 0;
+}

todo-list/tasks.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include "tasks.h"
+
+void loadTasksFromFile(struct Task tasks[], int *numTasks) {
+    FILE *file = fopen("tasks.txt", "r");
+    if (file == NULL) {
+        printf("No tasks file found.\n");
+        return;
+    }
+
+    int i = 0;
+    while (fscanf(file, "%49s %99s %19s %d", tasks[i].title, tasks[i].description, tasks[i].dueDate, &tasks[i].completed) == 4) {
+        i++;
+        if (i >= MAX_TASKS) {
+            break;
+        }
+    }
+
+    *numTasks = i;
+
+    fclose(file);
+}
+
+void saveTasksToFile(struct Task tasks[], int numTasks) {
+    FILE *file = fopen("tasks.txt", "w");
+    if (file == NULL) {
+        printf("Error saving tasks.\n");
+        return;
+    }
+
+    for (int i = 0; i < numTasks; i++) {
+        fprintf(file, "%s %s %s %d\n", tasks[i].title, tasks[i].description, tasks[i].dueDate, tasks[i].completed);
+    }
+
+    fclose(file);
+}
+
+void addTask(struct Task tasks[], int *numTasks) {
+    if (*numTasks >= MAX_TASKS) {
+        printf("Maximum number of tasks reached.\n");
+        return;
+    }
+
+    printf("Enter task title: ");
+    scanf("%s", tasks[*numTasks].title);
+
+    printf("Enter task description: ");
+    scanf("%s", tasks[*numTasks].description);
+
+    printf("Enter due date: ");
+    scanf("%s", tasks[*numTasks].dueDate);
+
+    tasks[*numTasks].completed = 0;
+
+    (*numTasks)++;
+}
+
+void viewTasks(struct Task tasks[], int numTasks) {
+    if (numTasks == 0) {
+        printf("No tasks available.\n");
+        return;
+    }
+
+    printf("Tasks:\n");
+    for (int i = 0; i < numTasks; i++) {
+        printf("Task %d:\n", i + 1);
+        printf("Title: %s\n", tasks[i].title);
+        printf("Description: %s\n", tasks[i].description);
+        printf("Due Date: %s\n", tasks[i].dueDate);
+        printf("Status: %s\n", tasks[i].completed ? "Completed" : "Incomplete");
+        printf("\n");
+    }
+}
+
+void markCompleted(struct Task tasks[], int numTasks) {
+    if (numTasks == 0) {
+        printf("No tasks available.\n");
+        return;
+    }
+
+    printf("Enter task number to mark as completed: ");
+    int taskNum;
+    scanf("%d", &taskNum);
+
+    if (taskNum < 1 || taskNum > numTasks) {
+        printf("Invalid task number.\n");
+        return;
+    }
+
+    tasks[taskNum - 1].completed = 1;
+}

todo-list/tasks.h

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+#ifndef TASKS_H
+#define TASKS_H
+
+#define MAX_TITLE_LENGTH 50
+#define MAX_DESC_LENGTH 100
+#define MAX_TASKS 100
+
+struct Task {
+    char title[MAX_TITLE_LENGTH];
+    char description[MAX_DESC_LENGTH];
+    char dueDate[20];
+    int completed;
+};
+
+void loadTasksFromFile(struct Task tasks[], int *numTasks);
+void saveTasksToFile(struct Task tasks[], int numTasks);
+void addTask(struct Task tasks[], int *numTasks);
+void viewTasks(struct Task tasks[], int numTasks);
+void markCompleted(struct Task tasks[], int numTasks);
+
+#endif

todo-list/tasks.txt

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+Exercise Running Brooo 1