了解编程分配的方向？

我们在C编程类中得到了一个赋值，用于修改程序以使其更加面向对象。部分原因是修复了toString方法。方向是：

 Modify the Student module to make it more object-oriented.

* Each Student object should have a function pointer that points to an 
  appropriate function for producing a string representation of the object.
* Provide a default toString method to each object when it is created. 
  The studentToString method should no longer be part of the Student interface 
  (as defined in Student.h)

但是，我们并不确定这意味着什么，并且想知道我们是否正在按照我们的想法走上正轨。以下是Student.c文件中的代码：

 #include <stdio.h>
 #include <stdlib.h>
 #include "Student.h"
 #include "String.h"

 static void error(char *s) {
     fprintf(stderr, "%s:%d %sn", __FILE__, __LINE__, s);
     exit(1);
 }

 extern Student newStudent(char *name, int age, char *major) {
     Student s;
     if (!(s = (Student) malloc(sizeof(*s))))
         error("out of memory");
     s->name = name;
     s->age = age;
     s->major = major;
     return s;
 }

 extern char *studentToString(Student s) {
     const int size = 3;
     char age[size + 1];
     snprintf(age, size, "%d", s->age);

     char *line = newString();
     line = catString(line, "<");
     line = catString(line, s->name);
     line = catString(line, " ");
     line = catString(line, age);
     line = catString(line, " ");
     line = catString(line, s->major);
     line = catString(line, ">");
     return line;
 }

我们知道* studentToString方法将被* toString方法替换，我们认为* toString方法将具有与* studentToString方法相同的内容。但是我们不明白它是如何使它更加面向对象的。我们还从方向上确定，当我们创建一个新的Student对象时，我们应该在newStudent方法中指向一个指向新的toString方法的指针。我们不是在寻找任何人为我们做这个计划。我们只想了解我们想要做什么，因为我们的教授本周已经出城了。任何帮助将不胜感激。