Dada una fecha, comprobar si es válida o no. Se puede suponer que la fecha dada está en el rango del 01/01/1800 al 31/12/9999.
Ejemplos:
Input : d = 10, m = 12, y = 2000 Output : Yes The given date 10/12/2000 is valid Input : d = 30, m = 2, y = 2000 Output : No The given date 30/2/2000 is invalid. The February month cannot have 30 as day.
La idea es sencilla. Necesitamos manejar las siguientes cosas.
1) y, m y d están en el rango permitido.
2) Los días de febrero están dentro del rango permitido y se maneja el año bisiesto .
3) Se manejan días en meses de 30 días.
A continuación se muestra la implementación para verificar si un año determinado es válido o no.
C++
// C++ program to check if
// given date is valid or not.
#include<iostream>
using namespace std;
const int MAX_VALID_YR = 9999;
const int MIN_VALID_YR = 1800;
// Returns true if
// given year is valid.
bool isLeap(int year)
{
// Return true if year
// is a multiple of 4 and
// not multiple of 100.
// OR year is multiple of 400.
return (((year % 4 == 0) &&
(year % 100 != 0)) ||
(year % 400 == 0));
}
// Returns true if given
// year is valid or not.
bool isValidDate(int d, int m, int y)
{
// If year, month and day
// are not in given range
if (y > MAX_VALID_YR ||
y < MIN_VALID_YR)
return false;
if (m < 1 || m > 12)
return false;
if (d < 1 || d > 31)
return false;
// Handle February month
// with leap year
if (m == 2)
{
if (isLeap(y))
return (d <= 29);
else
return (d <= 28);
}
// Months of April, June,
// Sept and Nov must have
// number of days less than
// or equal to 30.
if (m == 4 || m == 6 ||
m == 9 || m == 11)
return (d <= 30);
return true;
}
// Driver code
int main(void)
{
isValidDate(10, 12, 2000)? cout << "Yes\n" :
cout << "No\n";
isValidDate(31, 11, 2000)? cout << "Yes\n" :
cout << "No\n";
}
Java
// Java program to check if
// given date is valid or not.
import java.io.*;
class GFG
{
static int MAX_VALID_YR = 9999;
static int MIN_VALID_YR = 1800;
// Returns true if
// given year is valid.
static boolean isLeap(int year)
{
// Return true if year is
// a multiple of 4 and not
// multiple of 100.
// OR year is multiple of 400.
return (((year % 4 == 0) &&
(year % 100 != 0)) ||
(year % 400 == 0));
}
// Returns true if given
// year is valid or not.
static boolean isValidDate(int d,
int m,
int y)
{
// If year, month and day
// are not in given range
if (y > MAX_VALID_YR ||
y < MIN_VALID_YR)
return false;
if (m < 1 || m > 12)
return false;
if (d < 1 || d > 31)
return false;
// Handle February month
// with leap year
if (m == 2)
{
if (isLeap(y))
return (d <= 29);
else
return (d <= 28);
}
// Months of April, June,
// Sept and Nov must have
// number of days less than
// or equal to 30.
if (m == 4 || m == 6 ||
m == 9 || m == 11)
return (d <= 30);
return true;
}
// Driver code
public static void main(String args[])
{
if (isValidDate(10, 12, 2000))
System.out.println("Yes");
else
System.out.println("No");
if (isValidDate(31, 11, 2000))
System.out.println("Yes");
else
System.out.println("No");
}
}
// This code is contributed
// by Nikita Tiwari.
Python3
# Python Program to check
# if a date is valid or not
import datetime
def date_validation(day, month, year):
isValidDate = True
try :
datetime.datetime(int(year),
int(month), int(day))
except ValueError :
isValidDate = False
if(isValidDate) :
print ("Yes")
else :
print ("No")
date_validation(10,12,2000)
date_validation(31,11,2000)
# This code is contributed by ajay0007
C#
// C# program to check if
// given date is valid or not.
using System;
class GFG
{
const int MAX_VALID_YR = 9999;
const int MIN_VALID_YR = 1800;
// Returns true if
// given year is valid.
static bool isLeap(int year)
{
// Return true if year is a
// multiple of 4 and not
// multiple of 100. OR year
// is multiple of 400.
return (((year % 4 == 0) &&
(year % 100 != 0)) ||
(year % 400 == 0));
}
// Returns true if given
// year is valid or not.
static bool isValidDate(int d,
int m,
int y)
{
// If year, month and day
// are not in given range
if (y > MAX_VALID_YR ||
y < MIN_VALID_YR)
return false;
if (m < 1 || m > 12)
return false;
if (d < 1 || d > 31)
return false;
// Handle February month
// with leap year
if (m == 2)
{
if (isLeap(y))
return (d <= 29);
else
return (d <= 28);
}
// Months of April, June,
// Sept and Nov must have
// number of days less than
// or equal to 30.
if (m == 4 || m == 6 ||
m == 9 || m == 11)
return (d <= 30);
return true;
}
// Driver code
public static void Main()
{
if (isValidDate(10, 12, 2000))
Console.WriteLine("Yes");
else
Console.WriteLine("No");
if (isValidDate(31, 11, 2000))
Console.WriteLine("Yes");
else
Console.WriteLine("No");
}
}
// This code is contributed
// by Anant Agarwal.
PHP
<?php
// PHP program to check if
// given date is valid or not.
// Returns true if
// given year is valid.
function isLeap($year)
{
// Return true if year is
// a multiple of 4 and
// not multiple of 100.
// OR year is multiple of 400.
return ((($year % 4 == 0) &&
($year % 100 != 0)) ||
($year % 400 == 0));
}
// Returns true if given
// year is valid or not.
function isValidDate($d, $m, $y)
{
$MAX_VALID_YR = 9999;
$MIN_VALID_YR = 1800;
// If year, month and day
// are not in given range
if ($y > $MAX_VALID_YR ||
$y < $MIN_VALID_YR)
return false;
if ($m < 1 || $m > 12)
return false;
if ($d < 1 || $d > 31)
return false;
// Handle February month
// with leap year
if ($m == 2)
{
if (isLeap($y))
return ($d <= 29);
else
return ($d <= 28);
}
// Months of April, June,
// Sept and Nov must have
// number of days less than
// or equal to 30.
if ($m == 4 || $m == 6 ||
$m == 9 || $m == 11)
return ($d <= 30);
return true;
}
// Driver code
{
if(isValidDate(10, 12, 2000))
echo "Yes\n" ;
else
echo "No\n";
if(isValidDate(31, 11, 2000))
echo "Yes\n" ;
else
echo "No\n";
}
// This code is contributed
// by nitin mittal.
?>
Javascript
<script>
// Javascript program to check if
// given date is valid or not.
const MAX_VALID_YR = 9999;
const MIN_VALID_YR = 1800;
// Returns true if
// given year is valid.
function isLeap(year)
{
// Return true if year
// is a multiple of 4 and
// not multiple of 100.
// OR year is multiple of 400.
return (((year % 4 == 0) &&
(year % 100 != 0)) ||
(year % 400 == 0));
}
// Returns true if given
// year is valid or not.
function isValidDate(d, m, y)
{
// If year, month and day
// are not in given range
if (y > MAX_VALID_YR ||
y < MIN_VALID_YR)
return false;
if (m < 1 || m > 12)
return false;
if (d < 1 || d > 31)
return false;
// Handle February month
// with leap year
if (m == 2)
{
if (isLeap(y))
return (d <= 29);
else
return (d <= 28);
}
// Months of April, June,
// Sept and Nov must have
// number of days less than
// or equal to 30.
if (m == 4 || m == 6 ||
m == 9 || m == 11)
return (d <= 30);
return true;
}
// Driver code
isValidDate(10, 12, 2000) ? document.write("Yes<br>") :
document.write("No<br>");
isValidDate(31, 11, 2000) ? document.write("Yes<br>") :
document.write("No<br>");
// This code is contributed by souravmahato348
</script>
Producción :
Yes No
Complejidad de tiempo: O(1)
Espacio auxiliar: O(1)
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Artículo escrito por GeeksforGeeks-1 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA