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  1. #include <iostream>
  2. #include <list>
  3.  
  4. int main() {
  5.     std::list<int> lst = {1, 2, 3};
  6.     auto it = lst.begin();
  7.     ++it;
  8.     lst.insert(it, 4);  // 在指定位置插入元素
  9.     for (int num : lst) {
  10.         std::cout << num << " ";
  11.     }
  12.     return 0;
  13. }
Success #stdin #stdout 0.01s 5288KB
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Standard input is empty
stdout
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1 4 2 3
https://ideone.com/u6eC99
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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