How to check if same value is present in consecutive locations in a circular array using C?

Question

Say you are given an array which has all duplicate members except one, which out this non-duplicate member.

Answer 1

go around the arrayList and store the current int in a dummy variable. As you iterate compare against each one and replace. Repeat until the entire way around.

dummy = inf
currentInt = arrayList[0]
for(int = 0; int < size; int++){
    if(dummy == currentInt){return there is a repeat}
    dummy=currentInt
    currentInt=nextInt
}

return no repeat