I cannot save information of students from file to struct, When i tried to printf my sturct its not working, I think it should work but i dont understand, why it is not working. when i did only struct or use file like this it works.

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
//John exper 224(number) 99(grade)
//Alex King 199 36

struct Student{
    char name[100],surname[100],number[100];
    int grade[100];
};
readStudentsFromFile();
printStudents();
rankStudents();
calculateClassAverage();  


int main (){

    struct Student var[100];
    double co;
    readStudentsFromFile(&co);

}



readStudentsFromFile(double *co){
    char fileName[100],c;
    struct Student var[100];
    int i,count;
    printf("Enter file name: ");    
    gets(fileName);
    FILE *file;
    file=fopen(fileName,"r");
    
    if (file){
    count=1;    
        while(!feof(file))
        {
            c = fgetc(file);
            if(c == 'n')
            {
                count++;
            }
        }   
        for(i=0;i<count;i++){
            fscanf("%s %s %s %d",&var[i].name,&var[i].surname,&var[i].number,&var[i].grade);
        }
        }else{
            printf("Error: Unable to open file %s",fileName);
        }
    *co=count;
    printf("%s",var[1].name);
    fclose(file);
}

i need to save information to sturct