View Compilation Error

0_0_38323610_14091.cpp:7:20: error: size of array 'parents' has non-integral type 'double'
 int parents[MaxSize];
                    ^
0_0_38323610_14091.cpp:8:25: error: size of array 'num_elements' has non-integral type 'double'
 int num_elements[MaxSize];
                         ^