vector

using namespace std;
#include <iostream>
#include <typeinfo>
#include <vector>
int main() {
    vector<int> a(2);
	for (int i = 0; i < 10; i++)
	{
		a.push_back(i);//插入元素
	}
	for (auto& c : a) {
		cout << c;
	}//000123456789
    return 0;
}