Example: Structure Definition and Initialization in C

// Structure Definition and Initialization
#include <stdio.h>
#include <string.h> // For strcpy

int main() {
    // Step 1: Define the structure for a student
    struct Student {
        int studentID;
        char name[50];
        char major[30];
        float gpa;
    };

    // Step 2: Declare variables of type struct Student
    struct Student s1;
    struct Student s2;

    // Step 3: Initialize members of s1
    s1.studentID = 1001;
    strcpy(s1.name, "John Doe");
    strcpy(s1.major, "Computer Science");
    s1.gpa = 3.85;

    // Step 4: Initialize members of s2 using initializer list (C99 and later)
    struct Student s3 = {1002, "Jane Smith", "Biology", 3.92};


    // Step 5: Print details of s1
    printf("--- Student 1 Details ---\n");
    printf("ID: %d\n", s1.studentID);
    printf("Name: %s\n", s1.name);
    printf("Major: %s\n", s1.major);
    printf("GPA: %.2f\n\n", s1.gpa);

    // Step 6: Print details of s3
    printf("--- Student 3 Details ---\n");
    printf("ID: %d\n", s3.studentID);
    printf("Name: %s\n", s3.name);
    printf("Major: %s\n", s3.major);
    printf("GPA: %.2f\n", s3.gpa);

    return 0;
}