windmissing

摘要： 1.引用就是别名，如int &rnum = num;例1：int main(){ int a; int &ra = a; ra = 999; cout<<"a:"<<a<<endl; a = 0; cout<<"ra:"<<ra<<endl; cout<<&a<<' '<<&ra<<endl; return 0;}输出：a:999 //改变ra会导致a做同样的改变ra:0 //改变a会导致 阅读全文