2021-10-11 C++Primer 练习3.20 Vector

#include 
#include 
using namespace std;

int main()
{
	std::vector sc;
	int a;
	while (cin >> a)
	{
		sc.push_back(a);
	}

	for (decltype(sc.size()) i = 0; i < sc.size() - 1; ++i)
	{
		cout << sc[i] + sc[i + 1] << ' ';
	}
	cout << endl;

	for (decltype(sc.size()) i = 0; i < (sc.size()-1) / 2; i++)
	{
		cout << sc[i] + sc[sc.size() - 1 - i] << ' ';
	}
	cout << endl;

	return 0;
}