View Compilation Error

0_0_39419475_23021.cpp: In function 'void add(int, int)':
0_0_39419475_23021.cpp:17:30: error: invalid conversion from 'int*' to 'int' [-fpermissive]
   17 |                         a[y]=a;
      |                              ^
      |                              |
      |                              int*