Exceptions

处理异常

try {
   // 保护代码
} catch (ExceptionName e1) {
   // catch 块
}

抛出异常

// 简单异常
throw "Division by zero condition!";

// 自定义异常
#include <iostream>
#include <exception>
using namespace std;

struct MyException : public exception {
  const char * what () const throw () {
    return "C++ Exception";
  }
};

int main() {
  try {
    throw MyException();
  } catch(MyException& e) {
    std::cout << "MyException caught" << std::endl;
    std::cout << e.what() << std::endl;
  } catch(std::exception& e) {
    //其他的错误
  }
}