带析构语义的类的C++异常处理
C++异常处理
#include <iostream>
#include <string>
using namespace std;
class MyException {
public:
MyException(const string &message):message(message){}
~MyException(){}
const string &getMessage() const { return message; }
private:
string message;
};
class Demo {
public:
Demo(){ cout << "Constructor of Demo" << endl; }
~Demo(){ cout <<"Destructor of Demo" << endl; }
};
void func() throw (MyException) {
Demo d; //执行构造函数
cout << "Throw MyException in func()" << endl;
throw MyException("exception thrown by func()");
}
int main()
{
cout << "In main function" << endl;
try {
func();
}catch(MyException& e){
cout << "Caught an exception:" << e.getMessage()<< endl;
}
cout << "Resume the execution of main()" << endl;
return 0;
}
结果
In main function
Constructor of Demo
Throw MyException in func()
Destructor of Demo
Caught an exception:exception thrown by func()
Resume the execution of main()