Determine position of two points with respect to a 3D plane

#include using namespace std;  void check_position(int a, int b, int c, int d,                    int x1, int y1, int z1,                    int x2, int y2, int z2){        int value_1 = a * x1 + b * y1 + c * z1 + d;    int value_2 = a * x2 + b * y2 + c * z2 + d;          if ((value_1 > 0 && value_2 > 0)        || (value_1 < 0 && value_2 < 0))        cout 0 && value_2 < 0)        || (value_1 < 0 && value_2 > 0))        cout