int b = 10; int c = 15; const int *p1 = &b; //*p1 = 12; /* 错误 */ p1 = &c; /* 正确*/ cout<< *p1 << endl; int * const p2 = &b; *p2 = c; /* 正确*/ //p2 = &c; /* 错误 */ cout << *p2 << endl;