/in/foo.cc: In function 'int main()':
/in/foo.cc:13:22: error: expected ';' before 'else'
   13 |                 break
      |                      ^
      |                      ;
   14 |                 else
      |                 ~~~~  
/in/foo.cc:11:19: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   11 |                 if(a%i==0&&b%i==0)
      |                   ^