Biwise [ & ]

#include <stdio.h>

#define SET 223

// Prototipação
char *binbin(int a);

// Mascaramento de Bits
int main()
{
    int a;
    int r;

    printf("\n Type a value from 0 to 255: ");
    scanf("%d", &a);

    // &: Operador BitWise
    r = a & SET;

    printf("\n -> %5s = %d \n", binbin(a), a);
    printf("\n -> %5s = %d \n", binbin(SET), SET);
    printf("\n -> %5s = %d \n", binbin(r), r);
    //printf("\n --> %d + %d = %d \n", a, SET, a + SET);

    return(0);
}

char *binbin(int a)
{
    int i;
    static char bin[9];

    for( i = 0; i < 8; i++ )
    {
        if( a & 0x80 )
        {
            bin[i] = '1';
            a <<= 1;
        }

        else
        {
            bin[i] = '0';
            a <<= 1;
        }
    }
    bin[i] = '\0';

    return(bin);
}