三、改錯(cuò)題（本大題共5小題，每小題2分，共10分）

下面的類定義中有一處錯(cuò)誤，請(qǐng)寫出錯(cuò)誤所在行并給出修改意見

41.#include<iostream.h>

     class point{

     private: float x，y；

public: point( float a,float b) { x = a;y = b; }

   void f( ) {x=0;y=0;}

     void getx( ) { cout<< x<< endl; }

void gety( ) { cout<< y<< endl; }

} ;

  main() {

 point a (3.5) ;

a.getx( )

}

42. #include < iostream. h >

   main( ) {

 int x =7;

   const int * p = &x;

* p=99

   cout<< * p<< endl;

}

43. #include < iostream. h >

   class test{

 private: int x;y;

 public: void f( int a,int b) { x = a;y = b; }

 int max( ) { return(x > y) ? x:y; }

} ;

 main( ) {

 test a;

 a.f(1,3);

 cout<< a. max( ) << endl;

}

44. #include < iostream. h >

   class test{

     private: int x;

     public:test( int a) { x = a; }

 void set( int a) { x = a; }

 void get( ) { cout<< x<< endl; }

} ;

   class testl: public test{

     private: int x;

 public : testl ( int a) { x = a; }

       void set( int a) { x = a; }

void get( ) { cout<< x<< endl; }

 } ;

45. #include < iostream. h >

   class f{

     private: int x,y;

     public:void fl ( int a,int b) { x = a;y = b ;}

void print( ){ cout<< x<< ''<< y<< endl; }

     } ;

   main( ) {

     f a;

 float x = 1.5 y = 2.0;

a.fl(x,y);

     a.print( );

     }