对引用进行初始化示例（P39_2）

#include <iostream>

using namespace std;

int main()
{
const int cInt = 30;
int oneInt = 50;
int &ref = oneInt;
const int &rc1 = cInt;
const int &rc2 = oneInt;
const int &rc3 = ref;
int dInt = ref;
int eInt = cInt;
int fInt = rc1;
const int gInt = oneInt;
int &ref1 = ref;
const int hInt = ref;
const int jInt = cInt;
const int &mInt = rc1;
const int nInt = rc2;
cout << "OK" << endl;
int &r2 = (int &)rc1;
//int &r3 = (int &)cInt;
system("pause");
return 0;
}