Parse (split) a string in C++ using string delimiter (standard C++)

Question

I am parsing a string in C++ using the following:

using namespace std;

string parsed,input=\"text to be parsed\";
stringstream input_stringstream(input);

i         


        

Answer 1

For string delimiter

Split string based on a string delimiter. Such as splitting string "adsf-+qwret-+nvfkbdsj-+orthdfjgh-+dfjrleih" based on string delimiter "-+", output will be {"adsf", "qwret", "nvfkbdsj", "orthdfjgh", "dfjrleih"}

#include 
#include 
#include 

using namespace std;

// for string delimiter
vector split (string s, string delimiter) {
    size_t pos_start = 0, pos_end, delim_len = delimiter.length();
    string token;
    vector res;

    while ((pos_end = s.find (delimiter, pos_start)) != string::npos) {
        token = s.substr (pos_start, pos_end - pos_start);
        pos_start = pos_end + delim_len;
        res.push_back (token);
    }

    res.push_back (s.substr (pos_start));
    return res;
}

int main() {
    string str = "adsf-+qwret-+nvfkbdsj-+orthdfjgh-+dfjrleih";
    string delimiter = "-+";
    vector v = split (str, delimiter);

    for (auto i : v) cout << i << endl;

    return 0;
}

Output

adsf
qwret
nvfkbdsj
orthdfjgh
dfjrleih

For single character delimiter

Split string based on a character delimiter. Such as splitting string "adsf+qwer+poui+fdgh" with delimiter "+" will output {"adsf", "qwer", "poui", "fdg"h}

#include 
#include 
#include 

using namespace std;

vector split (const string &s, char delim) {
    vector result;
    stringstream ss (s);
    string item;

    while (getline (ss, item, delim)) {
        result.push_back (item);
    }

    return result;
}

int main() {
    string str = "adsf+qwer+poui+fdgh";
    vector v = split (str, '+');

    for (auto i : v) cout << i << endl;

    return 0;
}

Output

adsf
qwer
poui
fdgh