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  1. #include <stdio.h>
  2.  
  3. void recur(int flag[], int n, int idx) {
  4.   if (idx == n) {
  5.     for (int i = 0; i < n; i++) {
  6.       if (flag[i]) {
  7.         printf("%d  ", i);
  8.       }
  9.     }
  10.     printf("\n");
  11.     return;
  12.   }
  13.  
  14.   recur(flag, n, idx + 1);
  15.   int temp = flag[idx];
  16.   flag[idx] = 1;
  17.   recur(flag, n, idx + 1);
  18.   flag[idx] = temp;
  19. }
  20.  
  21. int main() {
  22.   int flag[] = {0, 0, 0};
  23.   recur(flag, 1, 0);
  24.   return 0;
  25. }
Success #stdin #stdout 0s 5272KB
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https://ideone.com/QKEoKT
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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