异常处理

#include <iostream>
using namespace std;
#include <fstream>



int main(int argc, char* argv[])
{
try{
	ifstream fin(argv[1]);
	if (!fin)
		throw 100;
	char buf[1000];
	fin.read(buf, 1000);
	if (!fin)
		throw 100.0;
	cout.write(buf, 1000);
	fin.close();
}
catch(double e){   //exception 异常 
	cout << "double:" << e << endl;
}
catch(long e){
	cout << "long:" << e << endl;	
}
catch(...){                             //不管什么类型的异常都处理，放在最后一个catch 
	cout << "exception!" << endl;
}
	cout << "what a good day!" << endl;	
	return 0;
}