运行 ID: 141139

Main.cc: In function ‘bool cmp(nde, nde)’:
Main.cc:14:9: error: ‘a’ was not declared in this scope
  return a . x < b . x ;
         ^
Main.cc:14:17: error: ‘b’ was not declared in this scope
  return a . x < b . x ;
                 ^
Main.cc: In function ‘int main()’:
Main.cc:21:3: error: ‘r’ was not declared in this scope
   r [i] . rd ( ) ;
   ^