Dado un carácter, la tarea es verificar si el carácter dado está en mayúsculas, minúsculas o caracteres no alfabéticos
. Ejemplos:
Input: ch = 'A' Output: A is an UpperCase character Input: ch = 'a' Output: a is an LowerCase character Input: ch = '0' Output: 0 is not an aplhabetic character
Enfoque: La clave para resolver este problema radica en el valor ASCII de un carácter. Es la forma más sencilla de conocer a un personaje. Este problema se resuelve con la ayuda del siguiente detalle:
- Los alfabetos en mayúsculas (AZ) se encuentran en el rango 65-91 del valor ASCII
- Los alfabetos de letras minúsculas (az) se encuentran en el rango 97-122 del valor ASCII
- Cualquier otro valor ASCII es un carácter no alfabético.
Implementación:
C++
// C++ implementation of the above approach
#include<bits/stdc++.h>
using namespace std;
void check(char ch)
{
if (ch >= 'A' && ch <= 'Z')
cout<< ch << " is an UpperCase character\n";
else if (ch >= 'a' && ch <= 'z')
cout<< ch << " is an LowerCase character\n";
else
cout<< ch << " is not an aplhabetic character\n";
}
// Driver Code
int main()
{
char ch;
// Get the character
ch = 'A';
// Check the character
check(ch);
// Get the character
ch = 'a';
// Check the character
check(ch);
// Get the character
ch = '0';
// Check the character
check(ch);
return 0;
}
// This code is contributed by Code_Mech
C
// C implementation of the above approach
#include <stdio.h>
void check(char ch)
{
if (ch >= 'A' && ch <= 'Z')
printf("\n%c is an UpperCase character",
ch);
else if (ch >= 'a' && ch <= 'z')
printf("\n%c is an LowerCase character",
ch);
else
printf("\n%c is not an aplhabetic character",
ch);
}
// Driver Code
int main()
{
char ch;
// Get the character
ch = 'A';
// Check the character
check(ch);
// Get the character
ch = 'a';
// Check the character
check(ch);
// Get the character
ch = '0';
// Check the character
check(ch);
return 0;
}
Java
// Java implementation of the above approach
class GFG
{
static void check(char ch)
{
if (ch >= 'A' && ch <= 'Z')
System.out.println("\n" + ch +
" is an UpperCase character");
else if (ch >= 'a' && ch <= 'z')
System.out.println("\n" + ch +
" is an LowerCase character" );
else
System.out.println("\n" + ch +
" is not an aplhabetic character" );
}
// Driver Code
public static void main(String []args)
{
char ch;
// Get the character
ch = 'A';
// Check the character
check(ch);
// Get the character
ch = 'a';
// Check the character
check(ch);
// Get the character
ch = '0';
// Check the character
check(ch);
}
}
// This code is contributed by Ryuga
Python3
# Python3 implementation of the above approach def check(ch): if (ch >= 'A' and ch <= 'Z'): print(ch,"is an UpperCase character"); elif (ch >= 'a' and ch <= 'z'): print(ch,"is an LowerCase character"); else: print(ch,"is not an aplhabetic character"); # Driver Code # Get the character ch = 'A'; # Check the character check(ch); # Get the character ch = 'a'; # Check the character check(ch); # Get the character ch = '0'; # Check the character check(ch); # This code is contributed by mits
C#
// C# implementation of the above approach
using System;
class GFG
{
static void check(char ch)
{
if (ch >= 'A' && ch <= 'Z')
Console.WriteLine("\n" + ch +
" is an UpperCase character");
else if (ch >= 'a' && ch <= 'z')
Console.WriteLine("\n" + ch +
" is an LowerCase character" );
else
Console.WriteLine("\n" + ch +
" is not an aplhabetic character" );
}
// Driver Code
public static void Main(String []args)
{
char ch;
// Get the character
ch = 'A';
// Check the character
check(ch);
// Get the character
ch = 'a';
// Check the character
check(ch);
// Get the character
ch = '0';
// Check the character
check(ch);
}
}
// This code is contributed by Rajput-JI
PHP
<?php
// PHP implementation of the above approach
function check($ch)
{
if ($ch >= 'A' && $ch <= 'Z')
print($ch . " is an UpperCase character\n");
else if ($ch >= 'a' && $ch <= 'z')
print($ch . " is an LowerCase character\n");
else
print($ch . " is not an aplhabetic " .
"character\n");
}
// Driver Code
// Get the character
$ch = 'A';
// Check the character
check($ch);
// Get the character
$ch = 'a';
// Check the character
check($ch);
// Get the character
$ch = '0';
// Check the character
check($ch);
// This code is contributed by mits
?>
Javascript
<script>
// JavaScript implementation of
// the above approach
function check(ch) {
if (ch >= "A" && ch <= "Z")
document.write(ch +
" is an UpperCase character <br>");
else if (ch >= "a" && ch <= "z")
document.write(ch +
" is an LowerCase character <br>");
else document.write(ch +
" is not an aplhabetic character <br>");
}
// Driver Code
var ch;
// Get the character
ch = "A";
// Check the character
check(ch);
// Get the character
ch = "a";
// Check the character
check(ch);
// Get the character
ch = "0";
// Check the character
check(ch);
</script>
Producción
A is an UpperCase character a is an LowerCase character 0 is not an aplhabetic character
Enfoque usando C+++ STL:
islower(): comprueba si un carácter está en minúsculas.
isupper(): comprueba si un carácter está en mayúsculas.
A continuación se muestra la implementación del enfoque anterior.
C++
// C++ code to check if a char is uppercase,
// lowercase or not an aplhabetic character
#include <bits/stdc++.h>
using namespace std;
void check(char ch)
{
if (isupper(ch))
cout << ch << " is an UpperCase character\n";
else if (islower(ch))
cout << ch << " is an LowerCase character\n";
else
cout << ch << " is not an aplhabetic character\n";
}
// Driver Code
int main()
{
char ch;
ch = 'A';
// Check the character
check(ch);
// Get the character
ch = 'a';
// Check the character
check(ch);
// Get the character
ch = '0';
// Check the character
check(ch);
return 0;
// This code is contributed by Shivesh Kumar Dwivedi
}
Producción
A is an UpperCase character a is an LowerCase character 0 is not an aplhabetic character
Tiempo Complejidad: O(1)
Espacio Auxiliar: O(1)