unos stringa i filtriranje prema binarnom zapisu broja

string-broj-bin.c

#include <stdio.h>
#include <stdlib.h>

//preprocessor

int main(){
    int M=0;
    char S1[17];
    //Unost stringa i broja
    printf("Unesite String S1: ");
    scanf("%s",S1);
    puts("");
    printf("Unesite ceo broj M: ");
    scanf("%d",&M);
    //Rad sa novim nizom
    char S2[17];
    char *s1; 
    char *s2;
    s1  = S1;
    s2  = S2;
    int one = 1;
    while(one && *s1){
        if (M & one)
        {
            *s2 = *s1;
            s2++;
        }
        s1++;
        one <<= 1;
    }
    *s2 = '\0';
    printf("Novi string S2: %s\n", S2);
}