C++练习5 对引用进行初始化

#include <iostream>
using namespace std;
int main()
{
    const int cInt = 3;//定义常量cInt并赋值为3
    int oneInt = 50;//定义变量oneInt并赋值为50
    int& ref = oneInt;//定义变量ref引用变量oneInt，值为50
    const int& rc1 = cInt;//定义常量rc1，引用常量cInt，值为3，属于常引用
    const int& rc2 = oneInt;//定义常量rc2，引用变量oneInt，值为50
    const int& rc3 = ref;//定义常量rc3,引用变量ref
    int dInt = ref;//定义变量dInt，并将ref赋给dInt
    int eInt = cInt;//定义变量eInt,将cInt赋予给eInt
    int flnt = rc1;//定义变量flnt，将rc1赋予给flnt
    const int gInt = oneInt;//定义常量gInt,将变量oneInt的值赋予gInt
    int& ref1 = ref;//定义变量ref1，引用ref
    const int hInt = ref;//定义常量hInt,并将ref赋值给hInt
    const int jInt = cInt;//定义常量jInt,并将cInt赋值给jInt
    const int& mInt = rc1;//定义常量mInt,引用rc1
    const int nInt = rc2;//定义常量nInt,并将rc2赋值给nInt
    cout << "OK" << endl;
    int& r2 = (int&)rc1;//定义变量r2,引用强制类型转换为int型的rc1
    int& r3 = (int&)cInt;//定义变量r3，引用强制类型转换为int型的cInt
    return 0;
}