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;}