有以下程序:include using namespace std;class sample{private: int n;public: samp

有以下程序： #include ＜iostream＞ using namespace std; class sample { private: int n; public: sample(){} sample (int m) { n=m; } sample add(sample s1,sample s2) { this-＞n=s1.n+s2.n; return (*this); } void disp() { cout＜＜"n="＜＜n＜＜end1; } }; int main () { sample s1(10) ,s2(5),s3; s3.add(s1,s2); s3.disp(); return 0; } 程序运行后，输出的结果是( )。

A．n=10

B．n=5

C．n=20

D．n=15

[单选题]有以下程序:include using namespace std;class sample{private:int n;public:sample有以下程序： #include ＜iostream＞ using namespace std; class sample { private: int n; public: sample(){} sample(int m) { n=m; } void addvalue(int m) { sample s; s.n=n+m; *this=s; } vo

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[单选题]有以下程序:include using namespace std;class sample{private:intn;public:sample(有以下程序：#include ＜iostream＞using namespace std;class sample{private: int n;public: sample() {} sample(int m) { n=m; } sample add(sample s1,sample s2) { this-＞n-s1.n+s2.n; return

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[单选题]有以下程序:include using namespace std;class A{private:int a;public:A (int i){a有以下程序： #include ＜iostream＞ using namespace std; class A { private: int a; public: A (int i) { a=i; } void disp() { cout＜＜a＜＜","; } }; class B { private: int b; public: B(int

[单选题]有以下程序:include using namespace std;class R{public: R(int f1,int r2) {R1=r1;有以下程序： #include ＜iostream＞ using namespace std; class R { public: R(int f1,int r2) { R1=r1; R2=r2; } void print(); void print ()const; private: int R1, R2; }; void R: :print()

[单选题]有以下程序:include using namespace std;class sample{private: int x;public: void有以下程序： #include ＜iostream＞ using namespace std; class sample { private: int x; public: void setx(int i) { x=i; } int putx () { return x; } }; int main ( ) { sample *p; sample A