vector<string> tokens;

string token;

size_t prev = 0, pos = 0;

do {

// find `delim` in `str` after index `prev`

pos = str.find(delim, prev);

// if not found, we are done here

if (pos == string::npos) {

// break out the last string and push in array

token = str.substr(prev, str.length());

tokens.push_back(token);

break;

}

// break out the string and push in array

token = str.substr(prev, pos - prev);

tokens.push_back(token);

// move forward

prev = pos + delim.length();

} while (prev < str.length());

// for(auto it = tokens.begin(); it != tokens.end(); ++it) {

// cout << *it << " ";

// } cout << "\n";

return tokens;

// split the string with space

vector<string> A = str_split(str, " ");

int longest = (*A.begin()).size();

for (auto it = A.begin() + 1; it != A.end(); ++it) {

if ((*it).size() > longest) {

longest = (*it).size();

}

}

for (int i = 0; i <= longest; ++i) {

for (auto it = A.begin(); it != A.end(); ++it) {

cout << left << setw((*it).size() + 1);

i < (*it).size() ? cout << (*it)[i] : cout << " ";

}

cout << "\n";

}

string str;

getline(cin, str);

printPattern(str);

return 0;