This solution processes student records from a file, sorts them by GPA, and generates a report.

Sample Input File: students.txt

Alice 1001 3.8
Bob 1002 3.9
Charlie 1003 3.5
Diana 1004 3.7
Eve 1005 4.0

Sample Output File: output.txt

Sorted Students (by GPA):
Eve 1005 4.00
Bob 1002 3.90
Alice 1001 3.80
Diana 1004 3.70
Charlie 1003 3.50

Average GPA: 3.78
Top Student: Eve (4.00)

Step 1: Define the Student Struct

#include <stdio.h>
#include <string.h>

struct Student {
    char name[50];
    int id;
    float gpa;
};

Step 2: Function to Read Students from File

This function reads student data from the input file.

int readStudents(FILE* fp, struct Student* students) {
    int count = 0;
    
    // Read until end of file or array is full
    while (fscanf(fp, "%s %d %f", students[count].name, 
                  &students[count].id, 
                  &students[count].gpa) == 3) {
        count++;
        if (count >= 100) {  // Safety limit
            break;
        }
    }
    
    return count;
}

Explanation:

• fscanf() returns the number of items successfully read
• We check if it equals 3 (name, id, gpa)
• Keep reading until EOF or we reach the array limit

Step 3: Bubble Sort by GPA (Descending)