Type getKey(){ return key;}∥提取关键码 void setKey( const Type x){key=x;}∥修改 Element<Type> operator ∥赋值 Element<Type> &x)i this=x;) int operator=( Type &x) /Athis=x freturn! this <x< this ) B int operator != Type &x) //this!=x f return this <xx< this; 3 int operator<=(Type&x)判this≤x freturn! this>x;3 int operator>=(Type&x)判this≥x freturn! this <x);) int operator <( Type &x) ∥.this<x f return this>x,)Type getKey ( ) { return key; }//提取关键码 void setKey ( const Type x ) { key = x; } //修改 Element<Type> & operator = //赋值 ( Element<Type> & x ) { this = x; } int operator == ( Type & x ) //判this == x { return ! ( this < x || x < this ); } int operator != ( Type & x ) //判this != x { return this < x || x < this; } int operator <= ( Type & x ) //判this  x { return ! ( this > x ); } int operator >= ( Type & x ) //判this  x { return ! ( this < x ); } int operator < ( Type & x ) //判this < x { return this > x; }