I need some help I am trying to change this code but having issues on the correct way to take the input of a string and rearrange the letters(randomize) so that the word displays in a mixed up form.
You are passing to the function mixup by value, so it is working on a copy of the string. You should pass by reference. You've also not put the parameter name in the function parameter list.
Try void mixUp(string& scrambleWord) on line 15, and then go back and read up on how to write functions.