given a lowercase string 'ab', write a program to generate all possible lowe...

#include <iostream>

#include <vector>

using namespace std;

void print(string& str, int n, int depth, vector<string>& re, string tmp)

{

if(depth == n)

{

re.push_back(tmp);

return;

}

tmp[depth] = str[depth];

print(str, n, depth+1, re, tmp);

tmp[depth] = str[depth] - 32;

print(str, n, depth+1, re, tmp);

}

int main()

{

string str("ab");

int n = str.size();

string tmp(n, '0');

vector<string> re;

print(str, n, 0, re, tmp);

for(auto ele:re)

cout<<ele<<endl;

return 0;

}