CPSC 120 Example handling of exceptions generated by std::stoi()

cpsc120_stoi_try_catch.cc

// Gist https://gist.github.com/e319fd4912f979828fc7aca6a714820d

#include <iostream>
#include <string>

int main(int argc, char const* argv[]) {
  std::string a_big_number{"65536"};
  int the_integer_value{-1};
  try {
    the_integer_value = std::stoi(a_big_number);
  } catch (std::exception const& e) {
    std::cout
        << "Exception! Looks like \"" << a_big_number
        << "\" isn't an integer because stoi() couldn't make sense of it.\n";
  }
  std::cout << "The integer value of \"" << a_big_number << "\" is "
            << the_integer_value << "\n";

  std::string this_is_not_a_number{
      "sixty five thousand five hundred and thirty six"};
  int value_never_changes{-1};
  try {
    value_never_changes = std::stoi(this_is_not_a_number);
  } catch (std::exception const& e) {
    std::cout
        << "Exception! Looks like \"" << this_is_not_a_number
        << "\" isn't an integer because stoi() couldn't make sense of it.\n";
  }
  std::cout << "The integer value of \"" << this_is_not_a_number << "\" is "
            << value_never_changes << "\n";
  return 0;
}