3. Convert octal number to decimal

#include <stdio.h>

int main()
{
    int octal, decimal, i, j;
    printf("Enter the octal number : ");
    scanf("%d", &octal);
    decimal = 0;
    i = 0;

    while(octal != 0)
    {
        j = octal % 10;
        decimal += j * pow(8, i);
        octal /= 10;
        i++;
    }

    printf("\nThe decimal is : %d\n", decimal);
    return 0;
}