W3School TIY Editor

#include <iostream>

using namespace std;

​

int main() {

  try {

    int age = 15;

    if (age >= 18) {

      cout << "访问已授权 - 您已满足年龄要求。";

    } else {

      throw (age);

    }

  }

  catch (int myNum) {

    cout << "访问被拒绝 - 您必须年满 18 周岁。\n"; 

    cout << "当前年龄: " << myNum;  

  }

  return 0;

}