foo.cc: In function ‘int main()’:
foo.cc:22:26: error: expected ‘;’ before ‘)’ token
   22 |                 for(ok==1)
      |                          ^
      |                          ;
foo.cc:22:23: warning: statement has no effect [-Wunused-value]
   22 |                 for(ok==1)
      |                     ~~^~~
foo.cc:24:17: error: expected primary-expression before ‘else’
   24 |                 else
      |                 ^~~~
foo.cc:23:35: error: expected ‘;’ before ‘else’
   23 |                 cout<<"Yes"<<endl;
      |                                   ^
      |                                   ;
   24 |                 else
      |                 ~~~~               
foo.cc:24:17: error: expected primary-expression before ‘else’
   24 |                 else
      |                 ^~~~
foo.cc:23:35: error: expected ‘)’ before ‘else’
   23 |                 cout<<"Yes"<<endl;
      |                                   ^
      |                                   )
   24 |                 else
      |                 ~~~~               
foo.cc:22:20: note: to match this ‘(’
   22 |                 for(ok==1)
      |                    ^
foo.cc:24:17: error: expected primary-expression before ‘else’
   24 |                 else
      |                 ^~~~