Dado un número hexadecimal como entrada, necesitamos escribir un programa para convertir el número hexadecimal dado en un número decimal equivalente.
Ejemplos:
C++
// C++ program to convert hexadecimal to decimal
#include <bits/stdc++.h>
using namespace std;
// Function to convert hexadecimal to decimal
int hexadecimalToDecimal(string hexVal)
{
int len = hexVal.size();
// Initializing base value to 1, i.e 16^0
int base = 1;
int dec_val = 0;
// Extracting characters as digits from last
// character
for (int i = len - 1; i >= 0; i--) {
// if character lies in '0'-'9', converting
// it to integral 0-9 by subtracting 48 from
// ASCII value
if (hexVal[i] >= '0' && hexVal[i] <= '9') {
dec_val += (int(hexVal[i]) - 48) * base;
// incrementing base by power
base = base * 16;
}
// if character lies in 'A'-'F' , converting
// it to integral 10 - 15 by subtracting 55
// from ASCII value
else if (hexVal[i] >= 'A' && hexVal[i] <= 'F') {
dec_val += (int(hexVal[i]) - 55) * base;
// incrementing base by power
base = base * 16;
}
}
return dec_val;
}
// driver program
int main()
{
string hexNum = "1A";
cout << (hexadecimalToDecimal(hexNum));
// This code is contributed by rakeshsahni
return 0;
}
Java
// Java program to convert hexadecimal to decimal
import java.io.*;
class GFG {
// Function to convert hexadecimal to decimal
static int hexadecimalToDecimal(String hexVal)
{
int len = hexVal.length();
// Initializing base value to 1, i.e 16^0
int base = 1;
int dec_val = 0;
// Extracting characters as digits from last
// character
for (int i = len - 1; i >= 0; i--) {
// if character lies in '0'-'9', converting
// it to integral 0-9 by subtracting 48 from
// ASCII value
if (hexVal.charAt(i) >= '0'
&& hexVal.charAt(i) <= '9') {
dec_val += (hexVal.charAt(i) - 48) * base;
// incrementing base by power
base = base * 16;
}
// if character lies in 'A'-'F' , converting
// it to integral 10 - 15 by subtracting 55
// from ASCII value
else if (hexVal.charAt(i) >= 'A'
&& hexVal.charAt(i) <= 'F') {
dec_val += (hexVal.charAt(i) - 55) * base;
// incrementing base by power
base = base * 16;
}
}
return dec_val;
}
// driver program
public static void main(String[] args)
{
String hexNum = "1A";
System.out.println(hexadecimalToDecimal(hexNum));
}
}
Python3
# Python3 program to convert # hexadecimal to decimal # Function to convert hexadecimal # to decimal def hexadecimalToDecimal(hexval): # Finding length length = len(hexval) # Initialize base value to 1, # i.e. 16*0 base = 1 dec_val = 0 # Extracting characters as digits # from last character for i in range(length - 1, -1, -1): # If character lies in '0'-'9', # converting it to integral 0-9 # by subtracting 48 from ASCII value if hexval[i] >= '0' and hexval[i] <= '9': dec_val += (ord(hexval[i]) - 48) * base # Incrementing base by power base = base * 16 # If character lies in 'A'-'F',converting # it to integral 10-15 by subtracting 55 # from ASCII value elif hexval[i] >= 'A' and hexval[i] <= 'F': dec_val += (ord(hexval[i]) - 55) * base # Incrementing base by power base = base * 16 return dec_val # Driver code if __name__ == '__main__': hexnum = '1A' print(hexadecimalToDecimal(hexnum)) # This code is contributed by virusbuddah_
C#
// C# program to convert
// hexadecimal to decimal
using System;
class GFG {
// Function to convert
// hexadecimal to decimal
static int hexadecimalToDecimal(String hexVal)
{
int len = hexVal.Length;
// Initializing base1 value
// to 1, i.e 16^0
int base1 = 1;
int dec_val = 0;
// Extracting characters as
// digits from last character
for (int i = len - 1; i >= 0; i--) {
// if character lies in '0'-'9',
// converting it to integral 0-9
// by subtracting 48 from ASCII value
if (hexVal[i] >= '0' && hexVal[i] <= '9') {
dec_val += (hexVal[i] - 48) * base1;
// incrementing base1 by power
base1 = base1 * 16;
}
// if character lies in 'A'-'F' ,
// converting it to integral
// 10 - 15 by subtracting 55
// from ASCII value
else if (hexVal[i] >= 'A' && hexVal[i] <= 'F') {
dec_val += (hexVal[i] - 55) * base1;
// incrementing base1 by power
base1 = base1 * 16;
}
}
return dec_val;
}
// Driver Code
static void Main()
{
String hexNum = "1A";
Console.WriteLine(hexadecimalToDecimal(hexNum));
}
}
// This code is contributed by mits
PHP
<?php
// PHP program to convert
// hexadecimal to decimal
// Function to convert
// hexadecimal to decimal
function hexadecimalToDecimal($hexVal)
{
$len = strlen($hexVal);
// Initializing base value
// to 1, i.e 16^0
$base = 1;
$dec_val = 0;
// Extracting characters as
// digits from last character
for ($i = $len - 1; $i >= 0; $i--)
{
// if character lies in '0'-'9',
// converting it to integral 0-9
// by subtracting 48 from ASCII value.
if ($hexVal[$i] >= '0' &&
$hexVal[$i] <= '9')
{
$dec_val += (ord($hexVal[$i]) - 48) *
$base;
// incrementing base by power
$base = $base * 16;
}
// if character lies in 'A'-'F' ,
// converting it to integral
// 10 - 15 by subtracting 55
// from ASCII value
else if ($hexVal[$i] >= 'A' &&
$hexVal[$i] <= 'F')
{
$dec_val += (ord($hexVal[$i]) - 55) *
$base;
// incrementing base by power
$base = $base * 16;
}
}
return $dec_val;
}
// Driver Code
$hexNum = "1A";
echo hexadecimalToDecimal($hexNum);
// This code is contributed by mits
?>
Javascript
<script>
// javascript program to convert hexadecimal to decimal
// Function to convert hexadecimal to decimal
function hexadecimalToDecimal(hexVal)
{
var len = hexVal.length;
// Initializing base value to 1, i.e 16^0
var base = 1;
var dec_val = 0;
// Extracting characters as digits from last
// character
for (var i = len - 1; i >= 0; i--) {
// if character lies in '0'-'9', converting
// it to integral 0-9 by subtracting 48 from
// ASCII value
if (hexVal.charAt(i) >= '0'
&& hexVal.charAt(i) <= '9') {
dec_val += (hexVal.charAt(i).charCodeAt(0) - 48) * base;
// incrementing base by power
base = base * 16;
}
// if character lies in 'A'-'F' , converting
// it to integral 10 - 15 by subtracting 55
// from ASCII value
else if (hexVal.charAt(i) >= 'A'
&& hexVal.charAt(i) <= 'F') {
dec_val += (hexVal.charAt(i).charCodeAt(0) - 55) * base;
// incrementing base by power
base = base * 16;
}
}
return dec_val;
}
// driver program
var hexNum = "1A";
document.write(hexadecimalToDecimal(hexNum));
// This code is contributed by 29AjayKumar
</script>
C++
// C++ program to convert octal to decimal
#include <bits/stdc++.h>
using namespace std;
int HexToDec(string n) { return stoi(n, 0, 16); }
int main()
{
string n = "1A";
cout << HexToDec(n);
return 0;
}
// This code is contributed by rakeshsahni
Java
// Java program to convert hexadecimal to decimal
import java.io.*;
class GFG {
public static int HexToDec(String n)
{
return Integer.parseInt(n, 16);
}
public static void main(String[] args)
{
String n = "1A";
System.out.println(HexToDec(n));
}
}
Python3
# Python program to convert hexadecimal to decimal def HexToDec(n): return int(n, 16); if __name__ == '__main__': n = "1A"; print(HexToDec(n)); # This code is contributed by 29AjayKumar
C#
// C# program to convert hexadecimal to decimal
using System;
public class GFG {
public static int HexToDec(String n)
{
return Convert.ToInt32(n, 16);
}
public static void Main(String[] args)
{
String n = "1A";
Console.WriteLine(HexToDec(n));
}
}
// This code is contributed by Amit Katiyar
Javascript
<script>
// javascript program to convert octal to decimal
function HexToDec(n)
{
return parseInt(n, 16);
}
var n = "1A";
document.write(HexToDec(n));
// This code is contributed by 29AjayKumar
</script>
Publicación traducida automáticamente
Artículo escrito por GeeksforGeeks-1 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA