大一第二学期第5周【程序阅读（6）】

#include <iostream>using namespace std;class Test{   private:      static int val;      int a;   public:      static int func();      static void sfunc(Test &r);};int Test::val=20;int Test::func(){   val+=val;   return val;}void Test::sfunc (Test &r){    r.a=25;    cout<<"Result3="<<r.a<<endl;}int main(){  cout <<"Resultl="<<Test::func()<<endl;  Test a;  cout<<"Result2="<<a.func()<<endl;  Test::sfunc (a);  return 0;}