#include <string>
#include <vector>
#include <iostream>
int main()
{
    std::string str = "hello,world";
    std::vector<std::string> vct;
    std::size_t pos = str.find(',');
    if(pos != std::string::npos)
    {
        ++pos;
        vct.push_back(str.substr(0, pos));
        vct.push_back(str.substr(pos));
        std::cout << vct[0] << '\n' << vct[1] << '\n';
    }
    else
    {
        std::cout << "No commas in your string\n";
    }
 
}

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