C++ Exceptions

Throw an exception with throw and handle it with try / catch.

ExampleC++

#include <iostream>
#include <stdexcept>
using namespace std;

int divide(int a, int b) {
  if (b == 0) throw runtime_error("Cannot divide by zero");
  return a / b;
}

int main() {
  try {
    cout << divide(10, 2) << endl;
    cout << divide(1, 0) << endl;
  } catch (const exception &e) {
    cout << "Error: " << e.what() << endl;
  }
  return 0;
}

Output

5
Error: Cannot divide by zero

Quick check

Which keyword raises an exception?

raisethrowerror

Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.

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