有以下程序:
#include<iostream>
using namespace std;
class R
public:
R(int r1,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<<R1<<","<<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.4,5
C.20,52
D.52,20