[Peace-Maker]

Depending on the size of the array, you might want to consider something like this to avoid mutation of the array at all.

PHP Code:

native void printnum(int n);
native void print(const char[] str);

public void main()
{
  int arrayNums[] = { 1, 2, 3};
  int arrayStart = 0;
  
  #define CircleIndex(%1) arrayNums[(arrayStart + %1) % sizeof(arrayNums)]
  #define ShiftArray(%1) arrayStart = (arrayStart + %1) % sizeof(arrayNums)
  
  print("Starting with\n");
  for(int i=0; i<sizeof(arrayNums); i++)
    printnum(CircleIndex(i));
  
  for (int x=0; x<5; x++)
  {
    print("After shifting\n");
    ShiftArray(1);
    for(int i=0; i<sizeof(arrayNums); i++)
      printnum(CircleIndex(i));
  }
} 


Your array doesn't start at index 0 anymore, but at index arrayNumsStart. You wrap the (arrayNumsStart + i) index around when reaching the array size to start at the beginning again.

Originally Posted by Output Starting with 1 2 3 After shifting 2 3 1 After shifting 3 1 2 After shifting 1 2 3 After shifting 2 3 1 After shifting 3 1 2

Edit: Use this to allow negative shifting as well.

PHP Code:

#define ShiftArray(%1) arrayStart = (arrayStart + %1 + sizeof(arrayNums)) % sizeof(arrayNums)