"""
myarray.py

Implement an ADT (abstract data type)
as a python class that gives an array 
with get(), set(), and length() methods.

      C
      int  i;
      struct foo     f;
      f.stuff
      
      struct foo     *f_ptr;
      (*f_ptr).stuff
      f_ptr -> stuff
      
      int* aptr;     // same
      int *aptr;     // declare aptr as a pointer to an int


"""

class MyArray:
    """
           index      value
           0          0
           1          0
           2
           3
           3
        
    
    """
    
    def __init__(self, size=100):
        """ initialize the MyArray instance """
        self.size = size           
        self.data = [0] * size
        
    def get(self, i):
        """ give me the value at position i """
        return self.data[i]

    def set(self, i, value):
        """ put value at position i """
        self.data[i] = value
        
   
def main():
    array = MyArray()
    print("The array is ", array)
    # put in some numbers 
    array.set(3, 10)   # put 10 at position 3
    array.set(5, 20)   # put 20 at position 5
    print(" array.get(5) is ", array.get(5))
    print(" array.get(3) is ", array.get(3))


main()