Convierta el código de color RGB dado en código de color hexadecimal

Posted on by Rudeus Greyrat

Dados tres colores, como R , G y B , convierta estos colores RGB en un código de color hexadecimal . Si la conversión no es posible, imprima -1.

Ejemplos: 

Entrada: R = 0, G = 0, B = 0 
Salida: #000000

Entrada: R = 255, G = 255, B = 256 
Salida: -1 
Explicación: 
Un código de color 256 no es posible ya que solo el rango 0-255 está disponible para un color.  

Acercarse:

  1. Primero, verifique si cada uno de los colores dados está en el rango 0-255 o no.
  2. De lo contrario, imprima -1 y salga del programa, ya que en este caso no es posible la conversión.
  3. Si están dentro del rango, entonces, para cada color, convierta el código de color dado en su número hexadecimal equivalente .
  4. Si el valor hexadecimal es de 1 dígito, agregue 0 a la izquierda para que sea de 2 dígitos.
  5. Luego, en la respuesta final, agregue ‘#’ al principio, seguido de los valores hexadecimales de R, G y B respectivamente.

A continuación se muestra la implementación del enfoque anterior. 

C++

// C++ code to convert the given RGB
// color code to Hex color code
 
#include <iostream>
using namespace std;
 
// function to convert decimal to hexadecimal
string decToHexa(int n)
{
    // char array to store hexadecimal number
    char hexaDeciNum[2];
 
    // counter for hexadecimal number array
    int i = 0;
    while (n != 0) {
 
        // temporary variable to store remainder
        int temp = 0;
 
        // storing remainder in temp variable.
        temp = n % 16;
 
        // check if temp < 10
        if (temp < 10) {
            hexaDeciNum[i] = temp + 48;
            i++;
        }
        else {
            hexaDeciNum[i] = temp + 55;
            i++;
        }
 
        n = n / 16;
    }
 
    string hexCode = "";
    if (i == 2) {
        hexCode.push_back(hexaDeciNum[0]);
        hexCode.push_back(hexaDeciNum[1]);
    }
    else if (i == 1) {
        hexCode = "0";
        hexCode.push_back(hexaDeciNum[0]);
    }
    else if (i == 0)
        hexCode = "00";
 
    // Return the equivalent
    // hexadecimal color code
    return hexCode;
}
 
// Function to convert the
// RGB code to Hex color code
string convertRGBtoHex(int R, int G, int B)
{
    if ((R >= 0 && R <= 255)
        && (G >= 0 && G <= 255)
        && (B >= 0 && B <= 255)) {
 
        string hexCode = "#";
        hexCode += decToHexa(R);
        hexCode += decToHexa(G);
        hexCode += decToHexa(B);
 
        return hexCode;
    }
 
    // The hex color code doesn't exist
    else
        return "-1";
}
 
// Driver program to test above function
int main()
{
    int R = 0, G = 0, B = 0;
    cout << convertRGBtoHex(R, G, B) << endl;
 
    R = 255, G = 255, B = 255;
    cout << convertRGBtoHex(R, G, B) << endl;
 
    R = 25, G = 56, B = 123;
    cout << convertRGBtoHex(R, G, B) << endl;
 
    R = 2, G = 3, B = 4;
    cout << convertRGBtoHex(R, G, B) << endl;
 
    R = 255, G = 255, B = 256;
    cout << convertRGBtoHex(R, G, B) << endl;
 
    return 0;
}

Java

// Java code to convert the given RGB
// color code to Hex color code
  
 
import java.util.*;
 
class GFG{
  
// function to convert decimal to hexadecimal
static String decToHexa(int n)
{
    // char array to store hexadecimal number
    char []hexaDeciNum = new char[2];
  
    // counter for hexadecimal number array
    int i = 0;
    while (n != 0) {
  
        // temporary variable to store remainder
        int temp = 0;
  
        // storing remainder in temp variable.
        temp = n % 16;
  
        // check if temp < 10
        if (temp < 10) {
            hexaDeciNum[i] = (char) (temp + 48);
            i++;
        }
        else {
            hexaDeciNum[i] = (char) (temp + 55);
            i++;
        }
  
        n = n / 16;
    }
  
    String hexCode = "";
    if (i == 2) {
        hexCode+=hexaDeciNum[0];
        hexCode+=hexaDeciNum[1];
    }
    else if (i == 1) {
        hexCode = "0";
        hexCode+=hexaDeciNum[0];
    }
    else if (i == 0)
        hexCode = "00";
  
    // Return the equivalent
    // hexadecimal color code
    return hexCode;
}
  
// Function to convert the
// RGB code to Hex color code
static String convertRGBtoHex(int R, int G, int B)
{
    if ((R >= 0 && R <= 255)
        && (G >= 0 && G <= 255)
        && (B >= 0 && B <= 255)) {
  
        String hexCode = "#";
        hexCode += decToHexa(R);
        hexCode += decToHexa(G);
        hexCode += decToHexa(B);
  
        return hexCode;
    }
  
    // The hex color code doesn't exist
    else
        return "-1";
}
  
// Driver program to test above function
public static void main(String[] args)
{
    int R = 0, G = 0, B = 0;
    System.out.print(convertRGBtoHex(R, G, B) +"\n");
  
    R = 255; G = 255; B = 255;
    System.out.print(convertRGBtoHex(R, G, B) +"\n");
  
    R = 25; G = 56; B = 123;
    System.out.print(convertRGBtoHex(R, G, B) +"\n");
  
    R = 2; G = 3; B = 4;
    System.out.print(convertRGBtoHex(R, G, B) +"\n");
  
    R = 255; G = 255; B = 256;
    System.out.print(convertRGBtoHex(R, G, B) +"\n");
  
}
}
 
// This code is contributed by 29AjayKumar

Python3

# Python3 program to convert the given
# RGB color code to Hex color code
 
# Function to convert decimal to hexadecimal
def decToHexa(n):
 
    # char array to store hexadecimal number
    hexaDeciNum = ['0'] * 100
 
    # Counter for hexadecimal number array
    i = 0
     
    while (n != 0):
 
        # Temporary variable to store remainder
        temp = 0
 
        # Storing remainder in temp variable.
        temp = n % 16
 
        # Check if temp < 10
        if (temp < 10):
            hexaDeciNum[i] = chr(temp + 48)
            i = i + 1
 
        else:
            hexaDeciNum[i] = chr(temp + 55)
            i = i + 1
 
        n = int(n / 16)
 
    hexCode = ""
    if (i == 2):
        hexCode = hexCode + hexaDeciNum[0]
        hexCode = hexCode + hexaDeciNum[1]
 
    elif (i == 1):
        hexCode = "0"
        hexCode = hexCode + hexaDeciNum[0]
 
    elif (i == 0):
        hexCode = "00"
 
    # Return the equivalent
    # hexadecimal color code
    return hexCode
 
# Function to convert the
# RGB code to Hex color code
def convertRGBtoHex(R, G, B):
 
    if ((R >= 0 and R <= 255) and
        (G >= 0 and G <= 255) and
        (B >= 0 and B <= 255)):
 
        hexCode = "#";
        hexCode = hexCode + decToHexa(R)
        hexCode = hexCode + decToHexa(G)
        hexCode = hexCode + decToHexa(B)
        return hexCode
 
    # The hex color code doesn't exist
    else:
        return "-1"
 
# Driver Code
R = 0
G = 0
B = 0
print (convertRGBtoHex(R, G, B))
 
R = 255
G = 255
B = 255
print (convertRGBtoHex(R, G, B))
 
R = 25
G = 56
B = 123
print (convertRGBtoHex(R, G, B))
 
R = 2
G = 3
B = 4
print (convertRGBtoHex(R, G, B))
 
R = 255
G = 255
B = 256
print (convertRGBtoHex(R, G, B))
 
# This code is contributed by Pratik Basu

C#

// C# code to convert the given RGB
// color code to Hex color code
using System;
 
class GFG{
 
// Function to convert decimal
// to hexadecimal
static string decToHexa(int n)
{
     
    // char array to store
    // hexadecimal number
    char []hexaDeciNum = new char[2];
 
    // Counter for hexadecimal
    // number array
    int i = 0;
    while (n != 0)
    {
 
        // Temporary variable to
        // store remainder
        int temp = 0;
 
        // Storing remainder in
        // temp variable.
        temp = n % 16;
 
        // Check if temp < 10
        if (temp < 10)
        {
            hexaDeciNum[i] = (char) (temp + 48);
            i++;
        }
        else
        {
            hexaDeciNum[i] = (char) (temp + 55);
            i++;
        }
        n = n / 16;
    }
    string hexCode = "";
     
    if (i == 2)
    {
        hexCode += hexaDeciNum[0];
        hexCode += hexaDeciNum[1];
    }
    else if (i == 1)
    {
        hexCode = "0";
        hexCode += hexaDeciNum[0];
    }
    else if (i == 0)
        hexCode = "00";
 
    // Return the equivalent
    // hexadecimal color code
    return hexCode;
}
 
// Function to convert the
// RGB code to Hex color code
static string convertRGBtoHex(int R, int G,
                                     int B)
{
    if ((R >= 0 && R <= 255) &&
        (G >= 0 && G <= 255) &&
        (B >= 0 && B <= 255))
    {
        string hexCode = "#";
        hexCode += decToHexa(R);
        hexCode += decToHexa(G);
        hexCode += decToHexa(B);
 
        return hexCode;
    }
 
    // The hex color code doesn't exist
    else
        return "-1";
}
 
// Driver code
public static void Main(string[] args)
{
    int R = 0, G = 0, B = 0;
    Console.Write(convertRGBtoHex(R, G, B) + "\n");
 
    R = 255; G = 255; B = 255;
    Console.Write(convertRGBtoHex(R, G, B) + "\n");
 
    R = 25; G = 56; B = 123;
    Console.Write(convertRGBtoHex(R, G, B) + "\n");
 
    R = 2; G = 3; B = 4;
    Console.Write(convertRGBtoHex(R, G, B) + "\n");
 
    R = 255; G = 255; B = 256;
    Console.Write(convertRGBtoHex(R, G, B) + "\n");
}
}
 
// This code is contributed by rutvik_56

Javascript

<script>
 
// Javascript code to convert the given RGB
// color code to Hex color code
 
// function to convert decimal to hexadecimal
function decToHexa(n)
{
    // char array to store hexadecimal number
    let hexaDeciNum = Array.from({length: 2}, (_, i) => 0);
    
    // counter for hexadecimal number array
    let i = 0;
    while (n != 0) {
    
        // temporary variable to store remainder
        let temp = 0;
    
        // storing remainder in temp variable.
        temp = n % 16;
    
        // check if temp < 10
        if (temp < 10) {
            hexaDeciNum[i] = String.fromCharCode(temp + 48);
            i++;
        }
        else {
            hexaDeciNum[i] =  String.fromCharCode(temp + 55);
            i++;
        }
    
        n = Math.floor(n / 16);
    }
    
    let hexCode = "";
    if (i == 2) {
        hexCode+=hexaDeciNum[0];
        hexCode+=hexaDeciNum[1];
    }
    else if (i == 1) {
        hexCode = "0";
        hexCode+=hexaDeciNum[0];
    }
    else if (i == 0)
        hexCode = "00";
    
    // Return the equivalent
    // hexadecimal color code
    return hexCode;
}
    
// Function to convert the
// RGB code to Hex color code
function convertRGBtoHex(R, G, B)
{
    if ((R >= 0 && R <= 255)
        && (G >= 0 && G <= 255)
        && (B >= 0 && B <= 255)) {
    
        let hexCode = "#";
        hexCode += decToHexa(R);
        hexCode += decToHexa(G);
        hexCode += decToHexa(B);
    
        return hexCode;
    }
    
    // The hex color code doesn't exist
    else
        return "-1";
}
 
 
// Driver Code
     
    let R = 0, G = 0, B = 0;
    document.write(convertRGBtoHex(R, G, B) +"<br/>");
    
    R = 255; G = 255; B = 255;
    document.write(convertRGBtoHex(R, G, B) +"<br/>");
    
    R = 25; G = 56; B = 123;
    document.write(convertRGBtoHex(R, G, B) +"<br/>");
    
    R = 2; G = 3; B = 4;
    document.write(convertRGBtoHex(R, G, B) +"<br/>");
    
    R = 255; G = 255; B = 256;
    document.write(convertRGBtoHex(R, G, B) +"<br/>");
                
</script>
Producción: 

#000000
#FFFFFF
#9183B7
#020304
-1

 

Complejidad de tiempo: O (log 16 N)

Espacio Auxiliar: O(1)

Publicación traducida automáticamente

Artículo escrito por Code_r y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA

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