Check out example codes for "when a vector in c++ is resized what happens to the elements of the vector". It will help you in understanding the concepts better.

Code Example 1

The C++ function std::vector::resize() changes the size of vector. If n is smaller than current size then extra elements are destroyed.

If n is greater than current container size then new elements are inserted at the end of vector.

If val is specified then new elements are initialed with val.

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