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C++ stringstream error handling


Once a stream moved into fail state, it will stay in fail state until gets clear()ed. That is, you need to do something like this:

if (ss.fail()) {
    std::cout << "This is not an integer
";
    ss.clear();
    // ...
}

Also not that just writing to a string stream does not replace the string stream's content! to replace the content of a string stream you can use the str() method:

ss.str(strNumber);

Alternatively you can create a new string stream in each iteration but this is relatively expensive if there are many streams being created.


Categories : C++

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