若有以下程序: #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; } void disp() { cout<<'n'=<<n<<end1; } }; int main() { sample s(10); s.addvalue(5); s.disp(); return 0; } 程序运行后的输出结果是