STL - Vector迭代器简单应用之计算元素和

Description

用vector向量容器装入10个整数，然后，使用迭代器iterator和accumulate算法统计出这10个元素的和

Solution

#include "stdafx.h"
#include "vector"
#include "iostream"
#include "numeric"        //'accumulate' needs it
using namespace std;


int _tmain(int argc, _TCHAR* argv[])
{
    vector<int> vint;
    //初始化vector
    for (int i=0; i<10; i++)
    {
        vint.push_back(i);
    }

    //使用迭代器
    vector<int>::iterator iter;
    for (iter = vint.begin(); iter != vint.end(); iter++)
    {
        cout << *iter << " ";            //need * before iter
    }

    cout << endl;
    int sum = accumulate(vint.begin(), vint.end(), 0);
    cout << "sum=" << sum << endl;
    return 0;
}