#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;
        int bit = 0;
        for(i = 0; i < n; i++){
                b[i] = (n >> i) & 1;
        }
}

int get_int(int b[]){
        int i = 0;
        int a = 0;
        while(i < INT_BIT){
                a += b[i];
                a = a << 1;
                i++;
        }
        return a;
}

int main(void){
        int b[INT_BIT];
        init_bits(b, INT_BIT);
        print_bits(b, INT_BIT);
        int b2[4];
        get_bits(b, 7);
        print_bits(b, 3);
        printf("%i\n",get_int(b2));
        printf("%i\n",get_int(b));
        return 0;
}