下面程序的运行结果为() #include<iostream. h> class A
题型:单项选择题
问题:
下面程序的运行结果为() #include<iostream. h> class A { public: A( ) {cout < <"1";} ~A( ) {cout < <"2";} }; class B:public A { public: B( ) {cout < <"3";} ~B( ) {cout < <"4";} }; void main( ) { B b; }
A.1234
B. 1324
C. 1342
D. 3142