51 lines
1002 B
C++
51 lines
1002 B
C++
// 异常变量生命周期
|
|
// 如 1: 抛出对象，接收引用，不会使用拷贝构造函数，会直接使用构造函数
|
|
#include <iostream>
|
|
#include <cstring>
|
|
#include <cstdlib>
|
|
|
|
using namespace std;
|
|
|
|
class Exception
|
|
{
|
|
private:
|
|
string msg;
|
|
|
|
public:
|
|
Exception()
|
|
{
|
|
this->msg = "";
|
|
cout << this << "Exception()" << endl;
|
|
}
|
|
Exception(const string &msg)
|
|
{
|
|
this->msg = msg;
|
|
cout << this << "Exception(const string &)" << endl;
|
|
}
|
|
Exception(const Exception &other)
|
|
{
|
|
this->msg = other.msg;
|
|
cout << this << "Exception(const Exception &)" << endl;
|
|
}
|
|
~Exception() { cout << this << "~Exception()" << endl; }
|
|
|
|
public:
|
|
string &getMsg() // const 表示该成员函数不会修改成员变量
|
|
{
|
|
return this->msg;
|
|
}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
try
|
|
{
|
|
throw Exception("异常");
|
|
}
|
|
catch (Exception &e)
|
|
{
|
|
cout << "捕获异常: " << e.getMsg() << endl;
|
|
}
|
|
|
|
return 0;
|
|
} |