/in/foo.cc:26:2: warning: "/*" within comment [-Wcomment]
  /*if(x.num[n]!=y.num[n])
   
/in/foo.cc:27:3: warning: "/*" within comment [-Wcomment]
  {/*return  x.num[n]<y.num[n];
    
/in/foo.cc: In function 'bool comp(const dangan&, const dangan&)':
/in/foo.cc:42:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^