结构体跟类有很多共同之处
当然可能类 更简便一些。
这是我自己写的程序
单独写一个set和get方法 就可以当做类来使用了

1. #include <stdio.h>
   
2. typedef struct{
   
3.                 int no;
   
4.                 char name[20];
   
5.                 int score[3];
   
6. }Student;
   
7. typedef struct{
   
8.         Student stu1;
   
9.         Student stu2;
   
10.         Student stu3;
    
11.         Student stu4;
    
12.         Student stu5;
    
13.         Student stu6;
    
14.         Student stu7;
    
15.         Student stu8;
    
16.         Student stu9;
    
17.         Student stu10;
    
18. }Students;
    
19. //Student stu;
    
20. //Student *pStudent=&stu;
    
21. 
    
22. Student * student_input(Student *pStudent);
    
23. void student_print(const Student *pStudent);
    
24. double student_average(const Student *pStudent);
    
25. int student_get_score(const Student *pStudent, int index);
    
26. double students_average(const Students *pstudents);
    
27. 
    
28. int main (int argc, char const *argv[])
    
29. {
    
30.         int average=0.0;
    
31.         Student stu={0,"",{0,0,0}};
    
32.         student_input(&stu);
    
33.         average=student_average(&stu);
    
34.         student_print(&stu);
    
35.        
    
36.        
    
37.        
    
38.         return 0;
    
39. }
    
40. Student * student_input(Student *pStudent){
    
41.         scanf ("%d %s %d %d %d",&pStudent->no,&pStudent->name,
    
42.         &pStudent->score[0],&pStudent->score[1],&pStudent->score[2]);
    
43.         return pStudent;
    
44. }
    
45. void student_print(const Student *pStudent){
    
46.         double average        ;
    
47.         average=(pStudent->score[0]+pStudent->score[1]+pStudent->score[2])/3.0;
    
48.         printf ("%d\t%s\t%d\t%d\t%d\t%f\n",pStudent->no,pStudent->name,
    
49.         pStudent->score[0],pStudent->score[1],pStudent->score[2],average);
    
50. }
    
51. double student_average(const Student *pStudent){
    
52.         double average=0.0;
    
53.         average=(pStudent->score[0]+pStudent->score[1]+pStudent->score[2])/3.0;
    
54.         return average;
    
55. }
    
56. int student_get_score(const Student *pStudent, int index){
    
57.         int a=0;
    
58.         a=pStudent->score[index];
    
59.         return a;
    
60. }
    
61. double students_average(const Students *pstudents,int index){
    
62.         double students_average;
    
63.         students_average=(pstudents->stu1.score[index]+pstudents->stu2.score[index]+pstudents->stu3.score[index]+pstudents->stu4.score[index]+pstudents->stu5.score[index]+pstudents->stu6.score[index]+pstudents->stu7.score[index]+pstudents->stu8.score[index]+pstudents->stu9.score[index]+pstudents->stu10.score[index])/10.0;
    
64.         return students_average;
    
65. }
    
66. void max_score(const Student *pstudent,int index ){
    
67.         int max_score=0;
    
68.         int i
    
69.         for (i=1;i<=10;i++){
    
70.                 if (max_score<=*pstudent->score[index]){
    
71.                         max_score=*pstudent->score[index];
    
72.                 }
    
73.                 pstudent++;
    
74.         }
    
75.         printf("%d",max_score);
    
76. }

复制代码

学习了  

OC的本质就是把C给封装了啊，底层还是面向对象的啊！

因为面向对象是建立在面向过的基础上的。