Convert a decimal number to hexadecimal using recursion

Problem statement:- Program to convert a decimal number to hexadecimal using recursion.

Data requirement:-

   Input Data:- n

  Output Data:-hexa, str1, str

Program in C

Here is the source code of the C program to convert a decimal number to hexadecimal using recursion.

Code:

#include<stdio.h>

#include<string.h>

char *DecimalToHexadecimal(int n)

{

    static char Hex[100];

     static int rem,i=0;

  if(n!=0)

  {

      rem=n%16;

      //Convert Integer to char

      if(rem<10)

        Hex[i++]=rem+48;// 48 Ascii=0

      else

        Hex[i++]=rem+55;//55 Ascii=7

   DecimalToHexadecimal(n/16);

  }

   return Hex;

}

int main()

{

    int n;

    printf("Enter the Decimal Value:");

    scanf("%d",&n);

    char *hexa;

    hexa=DecimalToHexadecimal(n);

    printf("Hexadecimal Value of Decimal number is: %s",strrev(hexa));

}

Input/Output:

Enter the Decimal Value:45

Hexadecimal Value of Decimal number is: 2D

Program in C++

Here is the source code of the C++ program to convert a decimal number to hexadecimal using recursion.

Code:

#include<iostream>

#include<cstring>

using namespace std;

char *DecimalToHexadecimal(int n)

{

    static char Hex[100];

     static int rem,i=0;

  if(n!=0)

  {

      rem=n%16;

      //Convert Integer to char

      if(rem<10)

        Hex[i++]=rem+48;// 48 Ascii=0

      else

        Hex[i++]=rem+55;//55 Ascii=7

   DecimalToHexadecimal(n/16);

  }

   return Hex;

}

int main()

{

    int n;

    cout<<"Enter the Decimal Value:";

    cin>>n;

    char *hexa;

    hexa=DecimalToHexadecimal(n);

    cout<<"Hexadecimal Value of Decimal number is: "<<strrev(hexa);

}

Input/Output:

Enter the Decimal Value:125

Hexadecimal Value of Decimal number is: 7D

Program in Java

Here is the source code of the Java program to convert a decimal number to hexadecimal using recursion.

Code:

import java.util.Scanner;

public class DecimalToHexadecimalConvert {

int rem;

String str3="";

String DecimalToHexadecimal(int n)

{

if(n!=0)

  {

      rem=n%16;

      //Convert Integer to char

      if(rem<10)

         str3+=(char)(rem+48);// 48 Ascii=0

        else

          str3+=(char)(rem+55);//55 Ascii=7

   DecimalToHexadecimal(n/16);

  }

   return str3;

}

public static void main(String[] args) {

           Scanner cs=new Scanner(System.in);

            int n;

    System.out.print("Enter the Decimal Value:");

    n=cs.nextInt();

    DecimalToHexadecimalConvert ob=new DecimalToHexadecimalConvert();

    String str= ob.DecimalToHexadecimal(n);

    String str1="";

    for(int i=str.length()-1;i>=0;i--)

    {

     str1+=str.charAt(i);

    }

    System.out.print("Hexadecimal Value of Decimal number is:"+str1);

    

        cs.close();

}

}

Input/Output:

Enter the Decimal Value:350

Hexadecimal Value of Decimal number is:15E

Program in Python

Here is the source code of the Python program to convert a decimal number to hexadecimal using recursion.

Code:

str3=""

def DecimalToHexadecimal(n):

    global str3

    if(n!=0):

        rem = n % 16

        if (rem < 10):

            str3 += (chr)(rem + 48) # 48 Ascii = 0

        else:

            str3 += (chr)(rem + 55) #55 Ascii = 7

        DecimalToHexadecimal(n // 16)

    return str3

n=int(input("Enter the Decimal Value:"))

str=DecimalToHexadecimal(n)

print("Hexadecimal Value of Decimal number is:",''.join(reversed(str)))

Input/Output:

Enter the Decimal Value:505

Hexadecimal Value of Decimal number is: 1F9

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