Practice Programs can generally be solved with a short program that directly applies the p...

Practice Programs can generally be solved with a short program that directly applies the programming principles presented in this chapter.

The Standard Template Library includes a class named exception that is the parent class for any exception thrown by an STL function. Therefore, any exception can be caught by this class. The following code sets up a try-catch block for STL exceptions:

#include #include #include using namespace std;int main(){    string s = "hello";try{    cout << "No exception thrown." << endl;}catch (exception& e){    cout << "Exception caught: " <<         e.what() << endl;}return 0;}

Modify the code so that an exception is thrown in the try block. You could try accessing an invalid index in a string using the at member function.