c++ 重设容器的长度（resize）

#include <iostream>
#include <vector>
using namespace std;
int main ()
{
    vector<int> myvector;

    // set some initial content:
    for (int i=;i<;i++) myvector.push_back(i);//长度为9

    myvector.resize();//重新设置长度为5，多余的元素删掉
    myvector.resize(,);//重新设置长度为8，填充元素为100
    myvector.resize();//默认填充的元素是0

    cout << "myvector contains:";
    for (int i=;i<myvector.size();i++)
        cout << ' ' << myvector[i];
    cout << '\n';

    return ;
}

输出

myvector contains: