View Compilation Error

0_0_39680051_23670.cpp:39:5: error: cannot declare '::main' to be a global variable
   39 | int main
      |     ^~~~
0_0_39680051_23670.cpp:41:32: error: expected '}' before ';' token
   41 |     ios::sync_with_stdio(false);
      |                                ^
0_0_39680051_23670.cpp:40:1: note: to match this '{'
   40 | {
      | ^
0_0_39680051_23670.cpp:43:18: error: expected constructor, destructor, or type conversion before '(' token
   43 |         getprimes(num);
      |                  ^
0_0_39680051_23670.cpp:45:5: error: 'cin' does not name a type
   45 |     cin>>T;
      |     ^~~
0_0_39680051_23670.cpp:46:5: error: expected unqualified-id before 'while'
   46 |     while (T--)
      |     ^~~~~
0_0_39680051_23670.cpp:71:5: error: expected unqualified-id before 'return'
   71 |     return 0;
      |     ^~~~~~
0_0_39680051_23670.cpp:72:1: error: expected declaration before '}' token
   72 | }
      | ^