Q8.5

#include <iostream>using namespace std;void print_pare(char a[], int l, int r, int cnt){if(l < 0 || r < l)return;if(l == 0 && r == 0){a[cnt] = '\0';puts(a); cout << endl;return;}if(l >= 0 && r >= l){if(l >= 0){a[cnt] = '(';print_pare(a, l - 1, r, cnt + 1);}if(r >= l){a[cnt] = ')';print_pare(a, l, r - 1, cnt + 1);}}}int main(void){const int cnt = 3;char str[2 * cnt];print_pare(str, cnt, cnt, 0);return 0;}