《c++程序设计原理与实践》第六章习题9

#include "../std_lib_facilitie.h"
//-------------------------------------------
//读入数字并将其组合为整数


int main()
try
{
	vectorintegers;
	int integer;
	while (cin >> integer)//制定输入向量
		integers.push_back(integer);
	switch (integers.size())//依据向量大小选择输出格式
	{
	case 1:cout << integers[0] << " is " << integers[0] << " one(s)\n"; break;
	case 2:cout << integers[0] << integers[1] << " is " << integers[0] << " tens and " << integers[1] << " ones\n"; break;
	case 3:
	{
		for (int i = 0; i < integers.size(); i++)cout << integers[i];
		cout << " is " << integers[0] << " hundred and " << integers[1] << " tens and " << integers[2] << " ones\n";
		break;
	}
	case 4:
	{
		for (int i = 0; i < integers.size(); i++)cout << integers[i];
		cout << " is " << integers[0] << " thousand and " << integers[1] << " hundred and " << integers[2] << " tens and " << integers[3] << " ones\n";
		break;
	}
	default:
		error("over input");
		break;
	}
	keep_window_open();
}
catch (exception& e) {
	cerr << "error: " << e.what() << '\n';
	keep_window_open();
	return 1;
}
catch (...) {
	cerr << "Oops: unknown exception!\n";
	keep_window_open();
	return 2;
}