C - Program Çalışmıyor - (Struct ve Function)

#include <stdio.h> 
  #define SIZE 10 
   
  struct student { 
              
             char name[20]; 
             char surname[20]; 
             int mid1,mid2,final; 
      }; 
   
  void bubble(struct student a[SIZE]){ 
            
           int pass,i,hold; 
            
           for(pass=1; pass<SIZE; pass++){ 
                       for(i=0; i<SIZE-1; i++){ 
                                hold= a[i]; 
                                a[i]= a[i+1]; 
                                a[i+1]= hold; 
                       } 
           }         
  } 
   
  int main(){ 
         
      int i,request; 
      struct student info[SIZE]; 
       
      FILE *cfPtr; 
       
      if ( (cfPtr = fopen("grades.txt", "r") ) == NULL){ 
           printf("File could not be opened\n"); 
      } 
      else { 
           printf("Which notes do you want to learn? For Midterm 1 >> Press 1\t For Midterm 2 >> Press 2\t For Final >> Press 3\n"); 
           scanf("%d",&request); 
      } 
   
      while( !feof(cfPtr) ){ 
             fscanf(cfPtr,"%s %s %d %d %d", info[i].name, info[i].surname, &info[i].mid1, &info[i].mid2, &info[i].final); 
      } 
       
      fclose(cfPtr); 
           
      if(request=1){ 
                  void bubble(struct student info[SIZE].name); 
                  void bubble(student info[SIZE].surname); 
                  void bubble(student info[SIZE].mid1); 
                  printf("Midterm 1 Scores:\n"); 
                                  for(i=0; i<SIZE; i++) 
                                           printf("%s %5.s %5.d\n", info[i].name, info[i].surname, info[i].mid1); 
      } 
       
      if(request=2){ 
                  void bubble(student info[SIZE].name); 
                  void bubble(student info[SIZE].surname); 
                  void bubble(student info[SIZE].mid2); 
                  printf("Midterm 2 Scores:\n"); 
                                  for(i=0; i<SIZE; i++) 
                                           printf("%s %5.s %5.d\n", info[i].name, info[i].surname, info[i].mid2); 
      } 
       
      if(request=3){ 
                  void bubble(student info[SIZE].name); 
                  void bubble(student info[SIZE].surname); 
                  void bubble(student info[SIZE].final); 
                  printf("Final Scores:\n"); 
                                  for(i=0; i<SIZE; i++) 
                                           printf("%s %5.s %5.d\n", info[i].name, info[i].surname, info[i].final); 
      } 
  }