求助 为什么运行了是空白

皆非

1. #include<stdio.h>
   
2. 
   
3. struct Student
   
4. {
   
5.     int num;
   
6.     char name[20];
   
7.     float score;
   
8. };
   
9.     int main()
   
10. {
    
11.     struct Student student1,student2;
    
12.     scanf("%d,%s,%f",&student1.num,student1.name,&student1.score);
    
13.     scanf("%d,%s,%f",&student2.num,student2.name,&student2.score);
    
14.     printf("the high score is:");
    
15.     if(student1.score>student2.score)
    
16. {
    
17.     printf("%d%s%f",student1.num,student1.name,student1.score);
    
18. }
    
19.     else if(student1.score<student2.score)
    
20. {
    
21.     printf("%d%s%f",student2.num,student2.name,student2.score);
    
22. }
    
23.     else
    
24. {
    
25.      printf("%d%s%f",student1.num,student1.name,student1.score);
    
26.      printf("%d%s%f",student2.num,student2.name,student2.score);
    
27. }
    
28. return 0;
    
29. }   

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