29 下列的 C++語言程式執行後輸出為何？ #include <iostream> #include <string> using namespace std;int main(){int a=0, b=0;string * s1=new string("test");string * s2=new string("test");if (s1==s2) a=a+2;if (*s1==*s2) b=b+2;count<<a<<" "<<b;
(A)0 0
(B)0 2
(C)2 0
(D)2 2