Playing with bit shifting and some other bitwise operators

shifty.c

/* Carlo Cattano - bitshifting experiments */
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

#define T_INTERVAL 30000                    // 30 milliseconds 

void    ft_putchar(char c)
{
    write(1, &c, 1);   
}

void bin(unsigned n)                        //Prints the int in binary   
{
    unsigned i;
    for (i = 1 << 31; i > 0; i = i / 2)
        (n & i) ? ft_putchar('1') : ft_putchar('0');
}

void    roll_up_down(int shift)                                 //shifts to left and right the whole 32 bit range
{
    int i = 0;
    while (++i < 31)
    {
        shift = shift << 1;
        bin(shift);
        usleep(T_INTERVAL);
        printf(" %d \n", shift);
    }
    while (i-- > 1)
    {
        shift = shift >> 1;
        bin(shift);
        usleep(T_INTERVAL);
        printf(" %d \n", shift);
    }
}
void    un_roll_up_down(unsigned int i, unsigned int shift)     //shifts to left and right the whole 32 bit range
{
    printf("\n--------------\nUnsigned INT\n------\n");
    while (++i < 31)
    {
        shift = shift << 1;
        bin(shift);
        usleep(T_INTERVAL);
        printf(" %d \n", shift);
    }
    while (i-- > 1)
    {
        shift = shift >> 1;
        bin(shift);
        usleep(T_INTERVAL);
        printf(" %d \n", shift);
    }
}

void    flip_flop(int n)
{
    printf("\n--------------\nFlip and shift\n------\n");
    int i = 64;
    int floppy_start = n;                                       //d 1431655765  b 1010101010101010101010101010101
    while (i-- > 0)
    {
        if(!(i % 4))
            floppy_start = ~floppy_start;                       //flips 1's to 0's or 0's to 1's
        if(!(i % 2))
            floppy_start = floppy_start >> 2;
        bin(floppy_start);
        usleep(T_INTERVAL);
        printf(" %d \n", floppy_start);
    }
}

int main() {
    
    int shift;
    
    shift = 1;
    roll_up_down(shift);
    
    shift = 2;
    roll_up_down(shift);
    roll_up_down(shift);
    
    flip_flop(1431655765);
    
    unsigned int ui = 1; 				// test with unsigned ints
    unsigned int ushift = 1;
    
    un_roll_up_down(ui , ushift);
    return 0;
}