Will Vector keep the order of elements?

I would like to quickly add lines of a file into a vector to get the size. I then create an array using that declaring that number of elements, then read each vector element into the array. I thought I read somewhere that a Vector may swap the order of the elements?

I thought I read
somewhere that a Vector may swap the order of the
elements?Well, if you did read that somewhere it might be true. If you write some serious code you cannot buy what people just say. You have to look into it for yourself and ESTABLISH what goes with your chosen data-structure.
PS. My advice to everybody is to look into this stuff and convince yourself you're doing the right thing.

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