It has segmentation fault. How to fix it?

#include #include

using namespace std;

vector insert(const vector & prev, int pos, int elem){ vector v; for (int i=0; i

return v; }

vector > getPermutationssOfOneToN(int n){ vector > v; vector s; if (n<=0){ v.push_back(s); return v; } else{ vector > v2 = getPermutationssOfOneToN(n-1); // all permutations of {1 .. n-1} for (int i=0; i new_perm = insert(s,j,n); v.push_back(new_perm); } } return v; } }

void print_vector(const vector& v){ for (int i=0; i

int main(){ for (int i= 1; i<5; i++){ cout << "permutationss of {1.." << i << "}:" << endl; vector > perms = getPermutationssOfOneToN(i); for (vector >::iterator itr=perms.begin(); itr

}