Program to convert octal to decimal

Problem statement:- Program to convert octal to decimal.

Data requirement:-

   Input Data:- octal

  Output Data:-decimal

Program in C

Here is the source code of the C Program to convert octal to decimal.

Code:

#include <stdio.h>

#include <math.h>

int

main ()

{

     int octal;

    printf("Enter the octal number: ");

    scanf("%d", &octal);

     int decimal = 0, sem = 0;

    while(octal!= 0)

    {

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

        sem++;

        octal=octal/ 10;

    }

    printf("Decimal number is: %d",decimal);

    return 0;

}

Input/Output:

Enter the octal number: 65

Decimal number is: 53

Program in C++

Here is the source code of the C++ Program to convert octal to decimal.

Code:

#include <iostream>

#include <cmath>

using namespace std;

int

main ()

{

    int octal;

    cout<<"Enter the octal number: ";

    cin>>octal;

    int decimal = 0, sem = 0;

    while(octal!= 0)

    {

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

        sem++;

        octal= octal/ 10;

    }

    cout<<"Decimal number is: "<<decimal;

    return 0;

}

Input/Output:

Enter the octal number: 73

Decimal number is: 59

Program in Java

Here is the source code of the Java Program to convert octal to decimal.

Code:

import java.util.Scanner;

public class OctalToDecimal {

public static void main(String[] args) {

    Scanner cs=new Scanner(System.in);

    int octal;

    System.out.println("Enter the octal number: ");

    octal=cs.nextInt();

     int decimal = 0, sem = 0;

    while(octal!= 0)

    {

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

        sem++;

        octal= octal/ 10;

    }

    System.out.println("Decimal number is: "+decimal);

    

    cs.close();

}

}

Input/Output:

Enter the octal number: 

703

Decimal number is: 451

Program in Python

Here is the source code of the Java Program to convert octal to decimal.

Code:

print("Enter the octal number: ");

octal=int(input());
decimal = 0
sem = 0
while(octal!= 0):
        decimal=decimal+(octal%10)*pow(8,sem)
        sem+=1
        octal=octal// 10
print("Decimal number is: ",decimal)

Input/Output:

Enter the octal number: 

11

Decimal number is:  9

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