View Compilation Error

0_0_39670122_16984.cpp:9:23: error: expected type-specifier before '(' token
    9 |         bool operator (const int & a, const int & b) const {
      |                       ^
0_0_39670122_16984.cpp:12:2: error: expected ';' after struct definition
   12 | }
      |  ^
      |  ;
0_0_39670122_16984.cpp: In function 'int main()':
0_0_39670122_16984.cpp:18:33: error: expected primary-expression before ')' token
   18 |                 sort(a,a+n,Rule1);
      |                                 ^