binary counter

counter.cpp

#include <fstream>

#define Nmax 40

int n, mask[40];

int next(int mask[]) {
    int i ;

    for (i = 0 ; i < n && mask[i]; i ++)
        mask[i] = 0;

    if (i < n) {
        mask[i] = 1;
        return 1;
    }
    return 0;
}

void print(int mask[]) {

    for (int i = 0 ; i < n ; i ++)
        printf("%d ", mask[i]);
    printf("\n");
}
int main()
{

    freopen("energii.in", "r", stdin);
//    freopen("energii.out", "w", stdout);

    scanf("%d", &n);

    while (next(mask)) {
        print(mask);
    }





    return 0;
}