program of octal to binary

#include<stdio.h>

int main(){

  

    long int binaryNumber,octalNumber=0,j=1,remainder;

    printf("Enter any number any binary number: ");

    scanf("%ld",&binaryNumber);

    while(binaryNumber!=0){

         remainder=binaryNumber%10;

        octalNumber=octalNumber+remainder*j;

        j=j*2;

        binaryNumber=binaryNumber/10;

    }

    printf("Equivalent octal value: %lo",octalNumber);

    return 0;

}