View Compilation Error

0_0_22963323_10686.cpp: In function 'void merge(Point*, Point*, int, int, int)':
0_0_22963323_10686.cpp:106:61: error: ambiguating new declaration of 'void merge(Point*, Point*, int, int, int)'
 void merge(Point y[], Point z[], int begin, int mid, int end)
                                                             ^
0_0_22963323_10686.cpp:24:5: note: old declaration 'int merge(Point*, Point*, int, int, int)'
 int merge(Point *,Point *,int ,int ,int);
     ^
0_0_22963323_10686.cpp:120:58: error: 'point' was not declared in this scope
  memcpy(z + begin, y + begin, (end - begin + 1) * sizeof(point));
                                                          ^