#include < iostream > using namespace std; class A{ int a, b, c; public: A(){ a=0; b=0; c=0; } A(int x, int y=2, int z=3){ a=x; b=y; c=z; } void Print() { cout << (a+b+c) << '\n'; } }; int main(void ){ A *p=new A(1,1); A a1, a2=1, a3=A(3,5); p->Print(); a1.Print( ); a2.Print( ); a3.Print( ); delete p; return 0; } 下列程序输出第1~4行依次为_____,_____,_____,_____