c++的ifstream和ofstream读写类对象

#include <iostream>#include <fstream>#include <string>using namespace std;class Student{public://有元声明最后放在public里面，不知道为啥friend istream& operator>>(istream&is, Student&st);friend ostream& operator<<(ostream&os, const Student&st);Student() = default;Student(string na, int sc){name = na;score = sc;}~Student() = default;private:string name;int score;};istream& operator>>(istream&is, Student&st)//ifstream是isream的子类，也能作为函数的参数{is >> st.name;is>>st.score;return is;}ostream& operator<<(ostream&os, const Student&st)//ofstream是osream的子类，也能作为函数的参数{os << st.name << " " << st.score << endl;return os;}int main(){     ////二进制文件操作//写文件//ofstream fout("student.dat",ios::binary);//能自动创建文件//Student  s1("李明",100);//fout.write((char*)&s1,sizeof(s1));//fout.flush();//fout.close();//读文件//ifstream fin("student.dat",ios::binary);//Student  s2; //fin.read((char*)&s2, sizeof(s2));//fin.close();    ////文本文件操作//写文件    ofstream fout("student.txt");//能自动创建文件Student  s1("李明", 100);fout << s1;fout.flush();fout.close();//读文件    ifstream fin("student.txt");Student  s2;fin >> s2;fin.close();return 0;}C++的ifstream和ofstream读写二进制文件只能用read和write函数吗？用<<和>>即使指定了binary方式，也不能读写二进制文件