Merge pull request #1 from WHH-JULIET/feature/enhanced-todo

To Do List

Author: muskansngh15

todo.c

@@ -1,40 +1,181 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_TASKS 50
+#define MAX_DESC 200
+
+typedef struct {
+    char description[MAX_DESC];
+    char priority[10];
+    char category[30];
+    int completed;
+} Task;
+
+Task tasks[MAX_TASKS];
+int count = 0;
+
+void loadTasks() {
+    FILE *file = fopen("tasks.dat", "rb");
+    if (file) {
+        fread(&count, sizeof(int), 1, file);
+        fread(tasks, sizeof(Task), count, file);
+        fclose(file);
+    }
+}
+
+void saveTasks() {
+    FILE *file = fopen("tasks.dat", "wb");
+    if (file) {
+        fwrite(&count, sizeof(int), 1, file);
+        fwrite(tasks, sizeof(Task), count, file);
+        fclose(file);
+    }
+}
+
+void addTask() {
+    if (count >= MAX_TASKS) {
+        printf("Task limit reached!\n");
+        return;
+    }
+    printf("Enter task description: ");
+    getchar();
+    fgets(tasks[count].description, MAX_DESC, stdin);
+    tasks[count].description[strcspn(tasks[count].description, "\n")] = 0;
+    
+    printf("Enter priority (High/Medium/Low): ");
+    fgets(tasks[count].priority, 10, stdin);
+    tasks[count].priority[strcspn(tasks[count].priority, "\n")] = 0;
+    
+    printf("Enter category: ");
+    fgets(tasks[count].category, 30, stdin);
+    tasks[count].category[strcspn(tasks[count].category, "\n")] = 0;
+    
+    tasks[count].completed = 0;
+    count++;
+    printf("Task added successfully!\n");
+}
+
+void viewTasks() {
+    if (count == 0) {
+        printf("No tasks available.\n");
+        return;
+    }
+    printf("\n%-3s %-30s %-10s %-15s %-10s\n", "#", "Description", "Priority", "Category", "Status");
+    printf("----------------------------------------------------------------\n");
+    for (int i = 0; i < count; i++) {
+        printf("%-3d %-30s %-10s %-15s %-10s\n", i + 1, tasks[i].description, 
+               tasks[i].priority, tasks[i].category, 
+               tasks[i].completed ? "Done" : "Pending");
+    }
+}
+
+void editTask() {
+    int id;
+    printf("Enter task number to edit: ");
+    if (scanf("%d", &id) != 1 || id < 1 || id > count) {
+        printf("Invalid task number!\n");
+        return;
+    }
+    id--;
+    printf("Current: %s\n", tasks[id].description);
+    printf("New description: ");
+    getchar();
+    fgets(tasks[id].description, MAX_DESC, stdin);
+    tasks[id].description[strcspn(tasks[id].description, "\n")] = 0;
+    printf("Task updated!\n");
+}
+
+void removeTask() {
+    int id;
+    printf("Enter task number to remove: ");
+    if (scanf("%d", &id) != 1 || id < 1 || id > count) {
+        printf("Invalid task number!\n");
+        return;
+    }
+    id--;
+    for (int i = id; i < count - 1; i++) {
+        tasks[i] = tasks[i + 1];
+    }
+    count--;
+    printf("Task removed!\n");
+}
+
+void markComplete() {
+    int id;
+    printf("Enter task number to mark complete: ");
+    if (scanf("%d", &id) != 1 || id < 1 || id > count) {
+        printf("Invalid task number!\n");
+        return;
+    }
+    tasks[id - 1].completed = 1;
+    printf("Task marked as complete!\n");
+}
+
+void sortTasks() {
+    for (int i = 0; i < count - 1; i++) {
+        for (int j = 0; j < count - i - 1; j++) {
+            if (strcmp(tasks[j].priority, tasks[j + 1].priority) > 0) {
+                Task temp = tasks[j];
+                tasks[j] = tasks[j + 1];
+                tasks[j + 1] = temp;
+            }
+        }
+    }
+    printf("Tasks sorted by priority!\n");
+}
+
+void searchTasks() {
+    char keyword[50];
+    printf("Enter search keyword: ");
+    getchar();
+    fgets(keyword, 50, stdin);
+    keyword[strcspn(keyword, "\n")] = 0;
+    
+    printf("\nSearch Results:\n");
+    int found = 0;
+    for (int i = 0; i < count; i++) {
+        if (strstr(tasks[i].description, keyword) || strstr(tasks[i].category, keyword)) {
+            printf("%d. %s [%s] (%s)\n", i + 1, tasks[i].description, 
+                   tasks[i].priority, tasks[i].category);
+            found = 1;
+        }
+    }
+    if (!found) printf("No matching tasks found.\n");
+}
 
 int main() {
-    char tasks[20][100];   // Stores up to 20 tasks of max 100 characters
-    int count = 0;         // Number of tasks added
-    int choice;            // Menu choice variable
+    loadTasks();
+    int choice;
 
     while (1) {
-        // Simple menu
-        printf("\n--- TO-DO LIST ---\n");
+        printf("\n=== ENHANCED TO-DO LIST ===\n");
         printf("1. Add Task\n");
-        printf("2. View Tasks\n");
-        printf("3. Exit\n");
-        printf("Enter choice: ");
-        scanf("%d", &choice);
-
-        if (choice == 1) {
-            // Add a new task
-            printf("Enter task: ");
-            getchar(); // clears leftover newline
-            fgets(tasks[count], 100, stdin);
-            count++;
+        printf("2. View All Tasks\n");
+        printf("3. Edit Task\n");
+        printf("4. Remove Task\n");
+        printf("5. Mark Complete\n");
+        printf("6. Sort by Priority\n");
+        printf("7. Search Tasks\n");
+        printf("8. Save & Exit\n");
+        printf("Enter choice (1-8): ");
+        
+        if (scanf("%d", &choice) != 1) {
+            printf("Please enter a valid number!\n");
+            while (getchar() != '\n');
+            continue;
         }
-        else if (choice == 2) {
-            // Display all tasks
-            printf("\nYour Tasks:\n");
-            for (int i = 0; i < count; i++) {
-                printf("%d. %s", i + 1, tasks[i]);
-            }
-        }
-        else if (choice == 3) {
-            // Exit program
-            break;
-        }
-        else {
-            printf("Invalid choice!\n");
+
+        switch (choice) {
+            case 1: addTask(); break;
+            case 2: viewTasks(); break;
+            case 3: editTask(); break;
+            case 4: removeTask(); break;
+            case 5: markComplete(); break;
+            case 6: sortTasks(); break;
+            case 7: searchTasks(); break;
+            case 8: saveTasks(); printf("Tasks saved. Goodbye!\n"); return 0;
+            default: printf("Invalid choice! Please enter 1-8.\n");
         }
     }
-    return 0;
 }