C++中引用、指针与const const与引用 别名。一初始化，就必须指向某个对象，不能指向引用。 int ival = 1024; int &refVal = ival; refVal = 1; cout << "ival = " << ival << ", refVal = " << refVal << endl; const int ci = 1024; const int &r1 = ci; // r1 = 42; 不能修改 const int r2 = ival;