C++学习笔记之浅谈异常处理

#include<iostream>
using namespace std;
int main()
{
	double triangler(double a, double b, double c);
	{
		double a, b, c;
		cin >> a >> b >> c;
		try                                //在try块中包含要检查的函数
		{
			while (a > 0 && b > 0 && &c > 0)
			{
				cout << triangler(a, b, c) << endl;	
				cin >> a >> b >> c;
			}
		}
		//catch (double)								//只能抛出对应类型的异常
		//{
		//	{cout << "a=" << a << ",b=" << b << ",c=" << c << ",that is not a triangler!" << endl; }
		//	cout << "end" << endl;
		//}
		catch (...)										//”...“代表可以抛出任何类型的异常
		{
			{cout << "a=" << a << ",b=" << b << ",c=" << c << ",that is not a triangler! it is all typical!" << endl; }
			cout << "end" << endl;
		}
	}
}
double triangler(double a, double b, double c)
{
	double s = (a + b + c) / 2;
	if (a + b <= c || a + c <= b || b + c <= a) throw a;		//抛出异常对象
		return sqrt(s * (s - a) * (s - b) * (s - c));
}