How do I resize a vector in C++11?
An example of an AI chatbot conversation about resizing vectors in C++11.
How do I resize a vector in C++11?
In C++11, you can resize a vector using the resize() member function. For example, vec.resize(new_size);.
What happens to the elements when I resize a vector?
If you increase the size, new elements are default-initialized. If you decrease it, elements are removed.
Can I specify a value for the new elements?
Yes, you can specify a value by using vec.resize(new_size, value); where value is the default value for new elements.
Is there a performance impact when resizing a vector?
Yes, resizing can lead to reallocation, which may affect performance. It's better to reserve space if you know the size in advance.
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