有以下程序:
#include <iostream>
using namespace std;
class R
public:
R(int f1,int r2)
R1=r1;
R2=r2;
void print();
void print ()const;
private:
int R1, R2;
;
void R: :print()
cout<<R1<<", "<<R2<<end1;
void R: :print() const
cout<<Rl<<", "<<R2<<end1;
int main ()
R a(5,4);
const R b(20,52);
b.print ();
return 0;
执行后的输出结果是
A.5,4
B.20,52
C.0,0
D.4,5