C Program convert octal to decimal Number

In this example,we will discuss how to convert octal to decimal number system in the c programming language. Following is the solution to the problem.

Code:

#include <stdio.h>

#include <math.h>

using namespace std;

int main()

{

   int octalNumber,originalnumber;

    printf("Enter a octal number: ");

    scanf("%d", &octalNumber);

  originalnumber=octalNumber;

    int decimalNumber = 0, i = 0, remainder;

    while (octalNumber != 0) 

    {

           decimalNumber += (octalNumber%10) * pow(8,i);

        ++i;

        octalNumber/=10;

    }

     printf("%d in octal = %d in decimal", originalnumber, decimalNumber);

   return 0;

}

Output:

Enter a octal number: 74

74 in octal = 60 in decimal