int list[5] = {1, 3, 6, 9, 12};
vector<int> vList;
copy(list,list+5,vList);
当使用上述方式进行赋值时,由于vList没有分配空间,而出错。
解决方法使用遍历数组,并调用push_back方法将元素保存到vList中。
另外一种比较好的方式是通过插入迭代器完成。
三种插入迭代器:back_inserter, front_inserter,inserter
示例代码:
#include <iostream>
#include <list>
#include <algorithm>
#include <string>
#include <numeric>
#include <iterator>
#include <vector>
#include <functional>
using namespace std;
int main() {
int lists[8] = {1,2,3,4,5,6,7,8};
vector<int> vList1;
vector<int> vList2;
ostream_iterator<int> screenOut(cout, " ");
copy(lists,lists+8,back_inserter(vList1));
cout << "vList1:" << endl;
copy(vList1.begin(),vList1.end(),screenOut);
cout << endl;
copy(vList1.begin(),vList1.end(),inserter(vList2,vList2.begin()));
cout << "vList2:" << endl;
copy(vList2.begin(),vList2.end(),screenOut);
cout << endl;
list<int> listTemp;
copy(vList2.begin(),vList2.end(),front_inserter(listTemp));
cout << "listTemp:" << endl;
copy(listTemp.begin(),listTemp.end(),screenOut);
cout << endl;
return 0;
}
运行结果:
vList1:
1 2 3 4 5 6 7 8
vList2:
1 2 3 4 5 6 7 8
listTemp:
8 7 6 5 4 3 2 1