有如下程序:#include<iostream>;usingnamespacestd;classtest{
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有如下程序:#include<iostream>;usingnamespacestd;classtest{
private:
inta;public:
test(){cout<<"constructor"<<endl;}
test(intt):a(t){cout<<a<<endl;}
test(consttest&_test)
{
a=_test.a;cout<<"copyconstructor"<<endl;}
~test(){cout<<"destructor"<<endl;}
};intmain()
{
testA(3);return0;}运行时的输出结果是()。
A.3
B.3destructor
C.copyconstructor
D.constructor
参考答案: