单项选择题
A.1
B.2
C.1和2
int main() { Student t1; Student t2(t1); //1 Student t3 = t1; //2 return 0; }Student为表示学生的类且未重载赋值操作符,则上述程序中有调用复制构造函数的是:
A.1
B.2
C.1和2