Getting wrong answer eventhough i coded same as given in previous videos

#1

#include
using namespace std;
void generate(char out,int n,int idx,int open,int close){
if(idx==n2){
out[idx]=’\0’;
cout<<out<<endl;
return;
}
if(open<n){
out[idx]=’(’;
generate(out,n,idx+1,open+1,close);
}
if(close<open){
out[idx]=’)’;
generate(out,n,idx+1,open,close+1);
}
return;
}
int main() {
int n;
cin>>n;
char out[1000];
generate(out,n,0,0,0);
return 0;
}

#2

at base case
condition should be
if (idx == 2*n) {

#3