Convert Octal to decimal using recursion

 Problem statement:- Program to Convert Octal to a decimal using recursion.

Data requirement:-

   Input Data:- n

  Output Data:-OctalToDecimal(n)

Program in C

Here is the source code of the C Program to Convert Octal to a decimal using recursion.

Code:

#include<stdio.h>

#include<math.h>

int OctalToDecimal(int n)

{

    static int decimal = 0, sem = 0;

    if(n!=0)

    {

    decimal=decimal+(n%10)*pow(8,sem);

    sem++;

    OctalToDecimal(n/10);

    }

   return decimal;

}

int main()

{

    int n;

    printf("Enter the Octal Value:");

    scanf("%d",&n);

    printf("Decimal Value of Octal number is: %d",OctalToDecimal(n));

}

Input/Output:

Enter the Octal Value:45

Decimal Value of Octal number is: 37

Program in C++

Here is the source code of the C++ Program to Convert Octal to decimal using recursion.

Code:

#include<iostream>

#include<cmath>

using namespace std;

int OctalToDecimal(int n)

{

    static int decimal = 0, sem = 0;

    if(n!=0)

    {

    decimal=decimal+(n%10)*pow(8,sem);

    sem++;

    OctalToDecimal(n/10);

    }

   return decimal;

}

int main()

{

    int n;

    cout<<"Enter the Octal Value:";

    cin>>n;

    cout<<"Decimal Value of Octal number is: "<<OctalToDecimal(n);

}

Input/Output:

Enter the Octal Value:165

Decimal Value of Octal number is: 117

Program in Java

Here is the source code of the Java Program to Convert Octal to a decimal using recursion.

Code:

import java.util.Scanner;

public class ConvertOctalToDecimal {

int decimal = 0, sem = 0;

int OctalToDecimal(int n)

{

    if(n!=0)

    {

    decimal=decimal+(int)((n%10)*Math.pow(8,sem));

    sem++;

    OctalToDecimal(n/10);

    }

   return decimal;

}

public static void main(String[] args) {

           Scanner cs=new Scanner(System.in);

            int n;

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

    n=cs.nextInt();

    ConvertOctalToDecimal ob=new  ConvertOctalToDecimal();

    System.out.print("Decimal Value of Octal number is: "+ob.OctalToDecimal(n));

        cs.close();

}

}

Input/Output:

Enter the Octal Value:30

Decimal Value of Octal number is: 24

Program in Python

Here is the source code of the Python program to convert Octal to decimal using recursion.

Code:

decimal=0

sem=0

def OctalToDecimal(n):

    global sem,decimal

    if(n!=0):

        decimal+=(n%10)*pow(8,sem)

        sem+=1

        OctalToDecimal(n // 10)

    return decimal

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

print("Decimal Value of Octal number is:",OctalToDecimal(n))

Input/Output:

Enter the Octal Value:55

Decimal Value of Octal number is: 45

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