有如下程序:
#include＜iostream＞
using namespace std;
class TestClass

public:
TestClass()cout＜＜"default constructor\n";
TestClass(const TestClass &x)cout＜＜"copy constructor\n";
;
TestClass userCode(TestClass b)TestClass c(b);return c;
int main()

TestClass a,d;
cout＜＜"calling userCode()\a";
d=userCode(

A．;
ret

总持仓