C++ list::insert

来源：互联网发布：淘宝客的软件编辑：程序博客网时间：2024/06/06 20:10

原文
mylist.insert (it,10)
会在mylist的it迭代器之前插入10
可选参数n
mylist.insert (it,n,20);
则会在it前插入n个20

// inserting into a list#include <iostream>#include <list>#include <vector>using namespace std;int main (){  list<int> mylist;  list<int>::iterator it;  // set some initial values:  for (int i=1; i<=5; ++i) mylist.push_back(i); // 1 2 3 4 5  it = mylist.begin();  ++it;       // it points now to number 2           ^  mylist.insert (it,10);                        // 1 10 2 3 4 5  // "it" still points to number 2                      ^  mylist.insert (it,2,20);                      // 1 10 20 20 2 3 4 5  --it;       // it points now to the second 20            ^  vector<int> myvector (2,30);  mylist.insert (it,myvector.begin(),myvector.end());                                                // 1 10 20 30 30 20 2 3 4 5                                                //               ^  cout << "mylist contains:";  for (it=mylist.begin(); it!=mylist.end(); ++it)    cout << ' ' << *it;  cout << '\n';  return 0;}

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