#include <stdio.h>

int INT_BIT = sizeof(int);

void print_bits(int b[], int size){
        int i = 0;
        while(i < size){
                printf("%i", b[i]);
                i++;
        }
        printf("\n");
}

void init_bits(int b[], int size){
        int i = 0;
        while(i < size){
                b[i] = 0;
                i++;
        }
}

void get_bits(int b[], int n){
        int i;
        for(i = 0; i < n; i++){
                b[i] = (n >> i) & 1;
        }
}

int get_int(int b[]){
        int a, i;
        a = 0;
        i = INT_BIT - 1;
        while(i >= 0){
                a = a << 1;
                a = a | b[i];
                i--;
        }
        return a;
}

int main(void){
        int b[sizeof(int)];
        int b2[4] = {1, 0, 1, 0};
        init_bits(b, INT_BIT);
        print_bits(b2, INT_BIT);
        get_bits(b, 3);
        print_bits(b, 3);
        printf("%i\n",get_int(b2));
        printf("%i\n",get_int(b));
        return 0;
}