有如下程序:
include<iostream>
using namespace std;
class Sac{
int n;
public:
Sac():n(4){cout<<n;}
Sac(int k):n(k){cout<<n;}
~Sac(){cont<<n+n;}
};
int main(){
Sac s1,*s2;
s2=new Sac(3);
delete s2;
return 0;
}
运行时的输出结果是______。
第1题:
有如下程序: #include<iostream>#include<iosream> using namespace std; class BASE{ char c; public; BASE(char n):c(n){} virtual ~ BASE(){cout<<c;} }; class DERIVED; public BASE{ char c; public: DERIVED (char n): BASE (n+1)
A.XY
B.YX
C.X
D.Y
第2题:
有如下程序:#include <iostream>using namespace std;class Base{private: char c;public: Base(char n) :c(n){} ~Base() { cout<<c; } };class Derived: public Base{private: char c; public: Derived(char n):Base(n+1),c(n) {} ~Derived() { cout<<c; }};int main (){ Derived obj ('x'); return 0;}执行上面的程序净输出
A.xy
B.yx
C.x
D.y
第3题:
第4题:
有如下程序: #include <iostream> using namespace std; int s=0; class sample { static int n; public: sample(int i) { n=i; } static void add() { s+=n; } };
A.2
B.5
C.7
D.3
第5题:
有下列程序: #include<iostream> using namespace Std; class Test { public: Test() {n+=2;} ~Test() {n-=3;} static int getNum(){return n;} private: static int n; }; int Test∷n=1; int main()
A.n=0
B.n=l
C.n=2
D.n=3