C program to convert Decimal to Octal number system

Example

Input

Input decimal: 22

Output

Octal number: 26

Algorithm to convert decimal to octal

Algorithm Decimal to Octal conversion
    begin:
        read(decimal);
        octal ← 0; place ← 1; rem ← 0;
        While (decimal > 0) do
            begin:
                rem ← decimal % 8;
                octal ← (rem * place) + octal;
                place ← place * 10;
                decimal ← decimal / 8;
            end;
        print('Octal number' octal);
    end;

/**
 * C program to convert from Decimal to Octal number system
 */

#include <stdio.h>

int main()
{
    long long decimal, tempDecimal, octal;
    int i, rem, place = 1;

    octal = 0;

    /* Input decimal number from user */
    printf("Enter any decimal number: ");
    scanf("%lld", &decimal);

    tempDecimal = decimal;

    /* Decimal to octal conversion */
    while(tempDecimal > 0)
    {
        rem = tempDecimal % 8;

        octal = (rem * place) + octal;

        tempDecimal /= 8;

        place *= 10;
    }

    printf("\nDecimal number = %lld\n", decimal);
    printf("Octal number = %lld", octal);

    return 0;
}

/*
Output : 

Enter any decimal number: 20
Decimal number = 20
Octal number = 24
*/