resize function in C++

In C++, the resize function is primarily used to change the size of a container. The functionality of the resize function includes:

1. Changing the size of the container: it can either increase or decrease the number of elements in the container.
2. Add Elements: If the size specified in the resize function is greater than the current size of the container, the resize function will append new elements to the end of the container and initialize them with default values.
3. Remove elements: If the size specified in the resize function is smaller than the current size of the container, the resize function will remove elements from the end of the container.
4. Initialize new elements: You can specify the values of the newly added elements during initialization.
5. Change the value of elements: You can use the resize function to change the values of elements in the container.

In general, the resize function is primarily used to change the size of the container, and can also initialize the values of newly added elements.

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