View Compilation Error

0_0_18087991_4944.cpp:7:9: error: size of array 'ball' has non-integral type 'double'
 P ball[N];
         ^
0_0_18087991_4944.cpp:8:8: error: size of array 'a' has non-integral type 'double'
 int a[N],b[N];
        ^
0_0_18087991_4944.cpp:8:13: error: size of array 'b' has non-integral type 'double'
 int a[N],b[N];
             ^