How can I handle errors in C++ STL?

How can I handle errors in C++ STL?

In C++ STL, you can handle errors using exceptions. For example, when accessing elements in a vector, you can use the at() method which throws an out_of_range exception if the index is invalid.

Can you give me an example of using exceptions with STL?

Sure! Here's a simple example:

#include <iostream>
#include <vector>
#include <stdexcept>

int main() {
    std::vector<int> vec = {1, 2, 3};
    try {
        std::cout << vec.at(5);
    } catch (const std::out_of_range& e) {
        std::cerr << "Error: " << e.what() << '\n';
    }
    return 0;
}

What other error handling techniques can I use?

Besides exceptions, you can also use error codes or assertions. Error codes can be returned from functions to indicate success or failure, while assertions can be used to catch programming errors during development.

Are there specific STL containers that require special error handling?

Yes, some containers like std::map or std::set may throw exceptions when you try to insert duplicate keys. It's important to handle these cases appropriately.