[Solved] printing array in reverse order avoiding duplicates c++

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You should initialize last, otherwise it will be filled with garbage and according to your logic, it will print last.

int last = arr[lengthOfArray-1];
int count = 0;
for(int i = lengthOfArray-1; i >=0; i--){
    if(last == arr[i]){
        ++count;
    } else{
        cout << last << endl;
        count = 1;
    }
    last = arr[i];
}
if (count > 0) {
    cout << last << endl;
}

solved printing array in reverse order avoiding duplicates c++