#include<iostream>
using namespace std;
class StudentID{
   int value;
public:
   StudentID(int id=0){
      value=id;
      cout<<"Assigning student id "<<vallue<<"\n";
 } 
};

class Student {
   string name;
   StudentID id;
public:
    Student(string n="noName", int ssID=0){
       cout<<"Constructing student "+n+"\n";
       name=n;
       StudentID id(ssID);
   } 
};
int main()
{Student s("Randy",58);
}
为什么StudentID构造函数却没有输出58?而是默认的0