怎么初始化一个不知道大小的vector
时间: 2024-04-28 12:18:56 浏览: 20
要初始化一个不知道大小的vector,可以使用默认构造函数来创建一个空的vector,并在需要时使用push_back()方法逐个添加元素。例如:
vector<int> myVector;
myVector.push_back(1);
myVector.push_back(2);
myVector.push_back(3);
这样就初始化了一个不知道大小的vector,并通过push_back()方法逐个添加了3个元素。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [vector的几种初始化及赋值方式](https://blog.csdn.net/weixin_44718794/article/details/106120546)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [C++ vector 初始化大小](https://blog.csdn.net/weixin_44676081/article/details/115625354)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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