Replace a string, check if sub-string is there in a string or not, Tokenize a string based on delimiter (Works within ROOT environment)

replaceSplit.C

void replaceSplit() {
    TString string1 = "GluGluToHHTo2G4Q_node_cHHH1_13TeV_HHWWggTag_1_FNUFEBDown01sigma";
    TString ToReplace = "HHWWggTag_1";
    TString ReplaceWith = "HHWWggTag_FH_1";

    std::cout << "==>\t"  << string1 << std::endl;
    std::cout << "==>\t"  << string1.ReplaceAll(ToReplace, ReplaceWith) << std::endl;

    std::cout << "==>\t" << string1.Contains("noda") << std::endl;
    std::cout << "==>\t" << string1.Contains("Tag_1") << std::endl;
    std::cout << "==>\t" << string1.Contains("Tag_FH") << std::endl;

    TObjArray*  tokens = string1.Tokenize("_");
    TIter next(tokens);
    TKey *key;
    while ( (key = (TKey*)next())) {
        std::cout <<"==> " <<  key->GetName() << std::endl;
    }
}