How to erase an white space from a string ?

Answer 1

there are a number of ways. There is a simple library function you can use called isspace () that checks for this.

or you can use strcmp(stuff, " "). It returns 0 if they're equal.
Then proceed to modify the array.

Don't forget #includes! :)

Answer 2

A side note,

I would use memmove() over strcpy ()

Answer 3

Can you please write some code as an example ?