请帮忙改正确，感激不尽！

Question

class X
{
public:
int a;
int &b;
const int c;
void setA(int i){a = i;}
public:
int X() {a=b=c=0;}
X(int i,int j,int k){a = i;b=j;c=k;}
void setC(int k)const{c=c+k;}
};

int main(int argc, char* argv[])
{
X x1;
X x2;
X x3(1,2,3);
x1.setA(3);
return 0;
}

Answer 1

int &b; ==> int b;

& 是引用,你去看下引用的用法.