Ejercicio
Tareas de ejercicio
Objetivo
Crea un programa en C# que puede almacenar hasta 2000 "tareas pendientes". Para cada tarea, debe conservar los siguientes datos:
• Fecha (un conjunto de 3 datos: día, mes y año)
• Descripción de la tarea
• Nivel de importancia (1 a 10)
• Categoría
El programa debe permitir al usuario las siguientes operaciones:
1 - Añadir una nueva tarea (la fecha debe "parecer correcta": día 1 al 31, mes 1 al 12, año entre 1000 y 3000).
2 - Mostrar las tareas entre dos fechas determinadas (día, mes y año). Si el usuario presiona Intro sin especificar la fecha, se tomará como "hoy". Debe mostrar el número de cada registro, la fecha (DD / MM / AAAA), descripción, categoría e importancia, todo en la misma línea, separado con guiones.
3 - Encuentre tareas que contengan un texto determinado (en descripción o categoría, no distingue entre mayúsculas y minúsculas). Mostrará número, fecha y descripción (solo 50 letras, en caso de que fuera más largo). Se debe notificar al usuario si no se encuentra ninguno.
4 - Actualizar un registro (te pedirá el número, mostrará el valor anterior de cada campo y el usuario podrá pulsar Intro para no modificar ninguno de los datos). Se debe advertir al usuario (pero no se le debe preguntar de nuevo) si ingresa un número de registro incorrecto. No es necesario validar ninguno de los campos.
5 - Eliminar algunos datos, entre dos posiciones indicadas por el usuario. Se debe advertir al usuario (pero no se le debe preguntar de nuevo) si ingresa algún número de registro incorrecto. Cada registro que se elimine debe mostrarse y se debe solicitar al usuario confirmación.
6 - Ordenar los datos alfabéticamente por fecha y (si dos fechas son iguales) por descripción.
7 - Buscar duplicados: Si dos registros tienen la misma descripción, ambos se mostrarán en pantalla.
P - Salir (finalizar la aplicación; como no almacenamos la información, se perderá).
(Sugerencia: puede conocer la fecha actual usando DateTime.Now.Day, DateTime.Now.Month y DateTime.Now.Year).
Código
using System;
public class exercis95
{
struct DateType
{
public ushort year;
public byte month;
public byte day;
}
struct TaskType
{
public DateType date;
public string description;
public byte level;
public string category;
}
public static void Main()
{
int capacity = 2000;
TaskType[] tasks = new TaskType[capacity];
char option;
int counter = 0;
string search, newValue;
bool found;
do
{
Console.WriteLine();
Console.WriteLine("Tasks database");
Console.WriteLine();
Console.WriteLine("1- Add a new task.");
Console.WriteLine("2- Show the tasks between two certain dates.");
Console.WriteLine("3- Find tasks that contain a certain text.");
Console.WriteLine("4- Update a record.");
Console.WriteLine("5- Delete some data, between two positions indicated.");
Console.WriteLine("6- Sort the data alphabetically by date.");
Console.WriteLine("7- Find Duplicates.");
Console.WriteLine("Q- Quit.");
Console.WriteLine("Enter an option:");
option = Convert.ToChar(Console.ReadLine().ToUpper());
switch (option)
{
case '1': //Add a new task
if (counter < capacity)
{
Console.Write("Enter the Description of the task: ");
tasks[counter].description = Console.ReadLine();
Console.Write("Enter the Level of the task (1-10): ");
tasks[counter].level = Convert.ToByte(Console.ReadLine());
Console.Write("Enter the Category of the task: ");
tasks[counter].category = Console.ReadLine();
do
{
Console.Write("Enter the Day of the task (1 to 31): ");
tasks[counter].date.day = Convert.ToByte(Console.ReadLine());
if (tasks[counter].date.day < 1 || tasks[counter].date.day > 31)
Console.WriteLine("Not a valid day!");
}
while (tasks[counter].date.day < 1 || tasks[counter].date.day > 31);
do
{
Console.Write("Enter the Month of the task (1 to 12): ");
tasks[counter].date.month = Convert.ToByte(Console.ReadLine());
if (tasks[counter].date.month < 1 || tasks[counter].date.month > 12)
Console.WriteLine("Not a valid month!");
}
while (tasks[counter].date.month < 1 || tasks[counter].date.month > 12);
do
{
Console.Write("Enter the Year of the task: ");
tasks[counter].date.year = Convert.ToUInt16(Console.ReadLine());
if (tasks[counter].date.year < 1000 || tasks[counter].date.year > 3000)
Console.WriteLine("Not a valid year!");
}
while (tasks[counter].date.year < 1000 || tasks[counter].date.year > 3000);
counter++;
}
else
Console.WriteLine("Database full.");
break;
case '2': //Show the tasks between two certain dates
if (counter >= 1)
{
byte startDay, startMonth;
ushort startYear;
byte endDay, endMonth;
ushort endYear;
Console.WriteLine("Starting day: ");
string number = Console.ReadLine();
if (number == "")
startDay = Convert.ToByte(DateTime.Now.Day);
else
startDay = Convert.ToByte(number);
Console.WriteLine("Starting month: ");
number = Console.ReadLine();
if (number == "")
startMonth = Convert.ToByte(DateTime.Now.Month);
else
startMonth = Convert.ToByte(number);
Console.WriteLine("Starting year: ");
number = Console.ReadLine();
if (number == "")
startYear = Convert.ToUInt16(DateTime.Now.Year);
else
startYear = Convert.ToUInt16(number);
Console.WriteLine("Final day: ");
number = Console.ReadLine();
if (number == "")
endDay = Convert.ToByte(DateTime.Now.Day);
else
endDay = Convert.ToByte(number);
Console.WriteLine("Final month: ");
number = Console.ReadLine();
if (number == "")
endMonth = Convert.ToByte(DateTime.Now.Month);
else
endMonth = Convert.ToByte(number);
Console.WriteLine("Final year: ");
number = Console.ReadLine();
if (number == "")
endYear = Convert.ToUInt16(DateTime.Now.Year);
else
endYear = Convert.ToUInt16(number);
string startDate = "" + startYear +
startMonth.ToString("00") + startDay.ToString("00");
string endDate = "" + endYear +
endMonth.ToString("00") + endDay.ToString("00");
for (int i = 0; i < counter; i++)
{
string currentDate = "" + tasks[i].date.year +
tasks[i].date.month.ToString("00") + tasks[i].date.day.ToString("00");
if (currentDate.CompareTo(startDate) >= 0 && currentDate.CompareTo(endDate) <= 0)
{
Console.WriteLine("The number is {0}: {1}/{2}/" +
"{3} - {4} - {5} - {6}.", i + 1,
tasks[i].date.day, tasks[i].date.month,
tasks[i].date.year, tasks[i].description,
tasks[i].category, tasks[i].level);
}
}
}
else
Console.WriteLine("Database empty.");
break;
case '3': //Find tasks that contain a certain text
if (counter >= 1)
{
Console.Write("Enter the text to search: ");
search = Console.ReadLine();
found = false;
string newValue5;
for (int i = 0; i < counter; i++)
{
if (tasks[i].description.IndexOf(search) >= 0
|| tasks[i].category.IndexOf(search) >= 0)
{
if (tasks[i].description.Length > 50)
newValue5 = tasks[i].description.Substring(0, 50);
else
newValue5 = tasks[i].description;
found = true;
Console.WriteLine("{0}: {1}/{2}/{3} - {4}",
i + 1, tasks[i].date.day, tasks[i].date.month,
tasks[i].date.year, newValue5);
}
}
if (!found)
Console.WriteLine("Not found.");
}
else
Console.WriteLine("Database empty.");
break;
case '4': //Update a record
if (counter >= 1)
{
Console.Write("Enter the number of the task to update: ");
int update = Convert.ToInt32(Console.ReadLine()) - 1;
if ((update >= 0) && (update < counter))
{
Console.Write("Description ({0}): ",
tasks[update].description);
newValue = Console.ReadLine();
if (newValue != "")
tasks[update].description = newValue;
Console.WriteLine("Level ({0}): ",
tasks[update].level);
newValue = Console.ReadLine();
if (newValue != "")
tasks[update].level = Convert.ToByte(newValue);
Console.WriteLine("Category ({0}): ",
tasks[update].category);
newValue = Console.ReadLine();
if (newValue != "")
tasks[update].category = newValue;
Console.WriteLine("Year ({0}): ",
tasks[update].date.year);
newValue = Console.ReadLine();
if (newValue != "")
tasks[update].date.year = Convert.ToUInt16(newValue);
Console.WriteLine("Month ({0}): ",
tasks[update].date.month);
newValue = Console.ReadLine();
if (newValue != "")
tasks[update].date.month = Convert.ToByte(newValue);
Console.WriteLine("Day ({0}): ",
tasks[update].date.day);
newValue = Console.ReadLine();
if (newValue != "")
tasks[update].date.day = Convert.ToByte(newValue);
}
else
Console.WriteLine("Wrong number entered.");
}
else
Console.WriteLine("Database empty.");
break;
case '5': //Delete some data, between two positions indicated by the user
if (counter >= 1)
{
Console.Write("Enter the first number of data to delete: ");
int delete = Convert.ToInt32(Console.ReadLine()) - 1;
Console.Write("Enter the second number of data to delete: ");
int delete2 = Convert.ToInt32(Console.ReadLine()) - 1;
for (int pos = delete; pos <= delete2; pos++)
{
for (int i = delete; i < counter; i++)
tasks[i] = tasks[i + 1];
counter--;
}
}
else
Console.WriteLine("Database empty.");
break;
case '6': //Sort the data alphabetically on date + description
for (int i = 0; i < counter - 1; i++)
{
string firstDate = "" + tasks[i].date.year +
tasks[i].date.month.ToString("00") +
tasks[i].date.day.ToString("00") +
tasks[i].description;
for (int j = i + 1; j < counter; j++)
{
string secondDate = "" + tasks[j].date.year +
tasks[j].date.month.ToString("00") +
tasks[j].date.day.ToString("00") +
tasks[j].description;
if (firstDate.CompareTo(secondDate) > 0)
{
TaskType aux = tasks[i];
tasks[i] = tasks[j];
tasks[j] = aux;
}
}
}
break;
case '7': //Find Duplicates
for (int i = 0; i < counter - 1; i++)
{
for (int j = i + 1; j < counter; j++)
{
if (tasks[i].description == tasks[j].description)
{
Console.WriteLine("{0} - {1}/{2}/{3}",
tasks[i].description, tasks[i].date.day,
tasks[i].date.month, tasks[i].date.year);
Console.WriteLine("{0} - {1}/{2}/{3}",
tasks[j].description, tasks[j].date.day,
tasks[j].date.month, tasks[j].date.year);
}
}
}
break;
case 'Q': //Quit
Console.WriteLine("Quitting...");
break;
default:
Console.WriteLine("You entered a wrong option. Please re-enter it.");
break;
}
}
while (option != 'Q');
}
}