25下列以C++語言撰寫的程式執行後的輸出為何？#include <iostream>using namespace std;class T1{public:T1(){ val_ = 0; }void SetVal(int v){ val_ = v; }int GetVal(){ return val_; }private:int val_;};int main(){T1 t1, t2;t1.SetVal(10) ;cout<<t1.GetVal()<< ' ' <<t2.GetVal() ;return 0 ;}