Added VERY old code. Very cringy to look at, but hey, we all had to start somewhere...

OSU Coursework/CS 261 - Data Structures/Assignment 5/main.c

@@ -0,0 +1,164 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include "toDoList.h"
+
+int main (int argc, const char * argv[])
+{
+	Task* newTask;
+	Task* firstTask;
+	char desc[TASK_DESC_SIZE], filename[50], *nlptr;
+	int priority;
+	char cmd = ' ';
+	FILE *filePointer;
+	DynArr* mainList = createDynArr(10);
+	
+	printf("\n\n** TO-DO LIST APPLICATION **\n\n");
+
+	do 
+	{
+	printf("Press:\n"
+			"'l' to load to-do list from a file\n"
+			"'s' to save to-do list to a file\n"
+			"'a' to add a new task\n"
+			"'g' to get the first task\n"
+			"'r' to remove the first task\n"
+			"'p' to print the list\n"
+			"'e' to exit the program\n"
+			);
+	/* get input command (from the keyboard) */
+	cmd = getchar();
+	/* clear the trailing newline character */
+	while (getchar() != '\n');	
+	
+	switch (cmd)
+   	{
+		case 'a': /* add new task */
+			printf("Please enter the task description: ");
+			/* get task description from user input (from keyboard) */
+			if (fgets(desc, sizeof(desc), stdin) != NULL)
+			{
+			  	/* remove trailing newline character */
+				nlptr = strchr(desc, '\n');
+				if (nlptr) 
+					*nlptr = '\0';
+			}
+			/* get task priority from user input (from keyboard) */
+			do {
+				printf("Please enter the task priority (0-999): ");
+				scanf("%d", &priority);
+			} while(!(priority >= 0 && priority <= 999));
+			
+			/* clear the trailing newline character */
+			while (getchar() != '\n');
+			
+			/* create task and add the task to the heap */
+			newTask = createTask(priority, desc);
+			addHeap(mainList, newTask);
+			printf("The task '%s' has been added to your to-do list.\n\n", desc);
+	  		break;
+		
+	   	case 'g': /* get the first task */
+		  	if (sizeDynArr(mainList) > 0) 
+			{
+				firstTask = (Task*)getMinHeap(mainList);
+				printf("Your first task is: %s\n\n", firstTask->description);
+			}
+			else
+				printf("Your to-do list is empty!\n\n");
+	  		
+			break;
+
+		case 'r': /* remove the first task */
+		  if (sizeDynArr(mainList) > 0) 
+			{
+				firstTask = (Task*)getMinHeap(mainList);
+				removeMinHeap(mainList);
+				printf("Your first task '%s' has been removed from the list.\n\n", firstTask->description);
+				/* need to free up memory occupied by this task */
+				free(firstTask);
+			}
+			else
+				printf("Your to-do list is empty!\n\n");
+	  		
+			break;
+		
+		case 'p': /* print the list */
+		  if (sizeDynArr(mainList) > 0) 
+			{
+			  	printList(mainList);				
+			}
+			else
+				printf("Your to-do list is empty!\n\n");
+	  		
+			break;
+
+
+		case 's': /* save the list to file */
+			if (sizeDynArr(mainList) > 0)
+			{ 
+			  	/* get filename from user input (from keyboard) */
+				printf("Please enter the filename: ");
+				if (fgets(filename, sizeof(filename), stdin) != NULL)
+				{
+			  		/* remove trailing newline character */
+					nlptr = strchr(filename, '\n');
+					if (nlptr) 
+						*nlptr = '\0';
+				}
+				/* open the file */
+				filePointer = fopen(filename, "w");	
+				if (filePointer == NULL) {
+			  		fprintf(stderr, "Cannot open %s\n", filename);
+					break;
+				}
+				/* save the list to the file */
+				saveList(mainList, filePointer);
+				/* close the file */
+				fclose(filePointer);
+				printf("The list has been saved into the file successfully.\n\n");			
+			}
+			else
+				printf("Your to-do list is empty!\n\n");
+			
+			break;
+		
+		case 'l': /* load the list from the file */
+	  	  	printf("Please enter the filename: ");
+			/* get filename from user input (from keyboard) */
+			if (fgets(filename, sizeof(filename), stdin) != NULL)
+			{
+		  		/* remove trailing newline character */
+				nlptr = strchr(filename, '\n');
+				if (nlptr) 
+					*nlptr = '\0';
+			}
+			/* open the file */
+			filePointer = fopen(filename, "r");	
+			if (filePointer == NULL) {
+		  		fprintf(stderr, "Cannot open %s\n", filename);
+				break;
+			}
+			/* load the list from the file */
+			loadList(mainList, filePointer);
+			/* close the file */
+			fclose(filePointer);
+			printf("The list has been loaded from file successfully.\n\n");			
+			break;
+		
+		case 'e': /* exit the program */
+		  	printf("Bye!\n\n");
+			break;
+		
+		default: 
+			printf("What is your command anyway?\n\n" );
+			break;
+	}
+	} 
+	while(cmd != 'e');
+	/* delete the list */
+	deleteList(mainList);	
+
+	return 0;
+}