problems when in array c++

#include

using namespace std;

void BubbleSort(int [ ], int); int main() { int x, n; cout >n; int *arr = new int(n); cout > arr[x]; } BubbleSort(arr, n); cout ARR[i+1]) { hold =ARR[i]; ARR[i]=ARR[i+1]; ARR[i+1]=hold; } } } }

explain my mistake with steps

Enter the number of items: 15 Enter 5 items 1 2 5 4 3 You entered: 1 -1113105159 2 3 4 Process exited after 4.64 seconds with Press any key to continue