解决set_unexpected不起作用的有关问题

解决set_unexpected不起作用的问题

编译环境:vs2012


按照Think in c++中写了一段代码


#include "stdafx.h"
#include <iostream>
#include <string>


using namespace std;
class up {};
class fit {};
void g();

void f(int i) throw (up,fit)
{
	switch (i){
	case 1:  throw up();
	case 2:  throw fit();
	}
	g();
}

void g() { throw 47; }//抛出异常后怎么没有调用my_unexpected(),出现debug error ,用abort()结束了进程

	void my_unexpected ()
{
	cout<<"unexpected exception thrown ";
	exit(1);
}

void main()
{
	set_unexpected(my_unexpected);
;
	for(int i=1;i<=3;i++)
		try{
			f(i);
	} catch (up) {
		cout<<"up canght"<<endl;
	} catch (fit) {
		cout<<"fit canght"<<endl;
	}
}

解决set_unexpected不起作用的有关问题

没能正常的调用自己的函数my_unexpected ()处理意外的异常

查阅MSND后发现,要调用自己的意外异常处理函数,必须显式的调用

  unexpected(); // library function to force calling the current unexpected handler


调用此函数后程序正常,如下

#include "stdafx.h"
#include <iostream>
#include <string>


using namespace std;
class up {};
class fit {};
void g();

void f(int i) throw (up,fit)
{
	switch (i){
	case 1:  throw up();
	case 2:  throw fit();
	}
	g();
}

void g() { throw 47; }//抛出异常后怎么没有调用my_unexpected(),出现debug error ,用abort()结束了进程

void my_unexpected ()
{
	cout<<"unexpected exception thrown ";
	exit(1);
}

void main()
{
	set_unexpected(my_unexpected);
	unexpected();
	for(int i=1;i<=3;i++)
		try{
			f(i);
	} catch (up) {
		cout<<"up canght"<<endl;
	} catch (fit) {
		cout<<"fit canght"<<endl;
	}
}


解决set_unexpected不起作用的有关问题