foo.cc: In function 'int myd(int)':
foo.cc:13:17: warning: init-statement in selection statements only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   13 |         else if((m==4||m==6||m==9||m==11)
      |                 ^
foo.cc:13:42: error: expected ';' before 'return'
   13 |         else if((m==4||m==6||m==9||m==11)
      |                                          ^
      |                                          ;
   14 |                 return 30;
      |                 ~~~~~~                    
foo.cc:13:34: warning: statement has no effect [-Wunused-value]
   13 |         else if((m==4||m==6||m==9||m==11)
      |                 ~~~~~~~~~~~~~~~~~^~~~~~~~
foo.cc:15:9: error: expected primary-expression before 'else'
   15 |         else
      |         ^~~~
foo.cc:14:27: error: expected ')' before 'else'
   14 |                 return 30;
      |                           ^
      |                           )
   15 |         else
      |         ~~~~               
foo.cc:13:16: note: to match this '('
   13 |         else if((m==4||m==6||m==9||m==11)
      |                ^
foo.cc: In function 'int main()':
foo.cc:25:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   25 |                 ans+=myd(m2)+1;
      |                 ^~~
      |                 abs
foo.cc:27:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   27 |                 ans+=myd(m2);
      |                 ^~~
      |                 abs
foo.cc:32:25: error: 'ans' was not declared in this scope; did you mean 'abs'?
   32 |                         ans+=366;
      |                         ^~~
      |                         abs
foo.cc:34:25: error: 'ans' was not declared in this scope; did you mean 'abs'?
   34 |                         ans+=365;
      |                         ^~~
      |                         abs
foo.cc:36:15: error: 'ans' was not declared in this scope; did you mean 'abs'?
   36 |         cout<<ans;
      |               ^~~
      |               abs
foo.cc: In function 'int myd(int)':
foo.cc:17:1: warning: control reaches end of non-void function [-Wreturn-type]
   17 | }
      | ^

[Hydro](https://hydro.ac)提供评测服务