【C++基础学习】Vector

#include <iostream>
#include <vector>
using namespace std;

int main(){
    cout << "****vector exercise****" << endl;
    vector<int>vec(9, 8);
    cout << "vec原值为：" << endl;
    //编写9个元素的vector对象,用迭代器把每个元素值改为当前值+1
    int i=0;
    for (vector<int>::iterator iter = vec.begin(); iter != vec.end();iter++)
    {
        cout << *iter << " ";
        *iter = (*iter)+(++i);
    }

    //对于数据时只读操作，可以使用const_iterator
    cout <<endl<< "vec改后值为：" << endl;
    for (vector<int>::const_iterator citer = vec.begin(); citer != vec.end(); citer++)
    {
        cout << *citer << " ";
    }

    //求vec的中值
    vector<int>::iterator min = vec.begin() + vec.size() / 2;
    //vector<int>::iterator min = vec.begin() +vec.size()/2;
    cout <<endl<<"vec的中值为：";
    cout << *min << endl;

    system("pause");
    return 0;
}