How to do bit-wise shifting in C

shifting.c

#include <stdio.h>

void dec_to_bin(int n);

int main()
{
    int x = 4;
    dec_to_bin(x);
    printf("\n4 << 1\t");
    dec_to_bin(x << 1);
    printf("\n4 >> 1\t");
    dec_to_bin(x >> 1);
    printf("\n4 << 2\t");
    dec_to_bin(x << 2);
    printf("\n4 >> 2\t");
    dec_to_bin(x >> 2);
    return 0;
}

void dec_to_bin(int n)
{
    char arr1[80];
    char digits[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 'A', 'B', 'C', 'D', 'E', 'F'};

    int i, j, imax, temp, base, remainder;

    long quotient = (long) n;
    long number;

    number = quotient;

    base = 2;

    for ( i = 0 ; quotient > 0 ; i++ )
    {
        remainder = quotient % base;
        quotient /= base;
        arr1[i] = digits[remainder];
    }


    imax = i;

    for ( i = 0, j = imax - 1; i < imax / 2 ; i++, j-- )
    {
        temp = arr1[i];
        arr1[i] = arr1[j];
        arr1[j] = temp;
    }

    printf("%d = (", number);
    for ( i = 0 ; i < imax ; i++ )
    {
        printf("%c ", arr1[i]);
    }
    printf("\b)%d", base);
}