Main.cc: In function ‘bool bj(over, over)’: Main.cc:6:5: error: ‘x’ was not declared in this scope if(x.conf!= y.conf) return df.conf>dc.conf; ^ Main.cc:6:14: error: ‘y’ was not declared in this scope if(x.conf!= y.conf) return df.conf>dc.conf; ^ Main.cc:8:1: warning: control reaches end of non-void function [-Wreturn-type] }//baim自制比较 ^