How does pascal code listing work, or rather one condition?

Question

Programming

In this post, a listing of the implementation of the Shannon-Fano algorithm in pascal was given. I just can't understand this little condition.
if (a<>' ') thenWhy are we comparing an array and a character constant equal to space?
Can someone explain how it works, and ideally, show an example in another language in C/C++/C#?
I would be very grateful.

Answer 1

I would venture to suggest that in Pascal, as in C / C ++, strings are arrays of characters, so comparing a character array with a string is quite correct.