Practice Programs in C: Student Record Management & Employee Database

This tutorial provides practical C programming exercises using structures, nested structures, arrays of structures, and typedef. It includes a Student Record Management System and an Employee Database, helping beginners implement real-world data management systems.

1. Student Record Management System

Program Description: Stores and displays multiple student records using array of structures.


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

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

int main() {
int n;
printf("Enter number of students: ");
scanf("%d", &n);

Student students[n];

// Input student details
for(int i = 0; i < n; i++) {
printf("\nEnter ID, Name, Marks for student %d: ", i+1);
scanf("%d", &students[i].id);
scanf(" %[^\n]", students[i].name); // input string with spaces
scanf("%f", &students[i].marks);
}

// Display student details
printf("\nStudent Records:\n");
for(int i = 0; i < n; i++) {
printf("ID: %d, Name: %s, Marks: %.2f\n",
students[i].id, students[i].name, students[i].marks);
}

return 0;
}

Sample Output:


Enter number of students: 2

Enter ID, Name, Marks for student 1: 101 Muni 95.5
Enter ID, Name, Marks for student 2: 102 Pooja 88.0

Student Records:
ID: 101, Name: Muni, Marks: 95.50
ID: 102, Name: Pooja, Marks: 88.00

2. Employee Database

Program Description: Stores multiple employee records including nested structure for date of joining.


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

typedef struct {
int day, month, year;
} Date;

typedef struct {
int empId;
char name[50];
float salary;
Date doj; // date of joining
} Employee;

int main() {
int n;
printf("Enter number of employees: ");
scanf("%d", &n);

Employee emp[n];

// Input employee details
for(int i = 0; i < n; i++) {
printf("\nEnter ID, Name, Salary: ");
scanf("%d", &emp[i].empId);
scanf(" %[^\n]", emp[i].name);
scanf("%f", &emp[i].salary);

printf("Enter Date of Joining (DD MM YYYY): ");
scanf("%d %d %d", &emp[i].doj.day, &emp[i].doj.month, &emp[i].doj.year);
}

// Display employee details
printf("\nEmployee Database:\n");
for(int i = 0; i < n; i++) {
printf("ID: %d, Name: %s, Salary: %.2f, DOJ: %02d-%02d-%04d\n",
emp[i].empId, emp[i].name, emp[i].salary,
emp[i].doj.day, emp[i].doj.month, emp[i].doj.year);
}

return 0;
}

Sample Output:


Enter number of employees: 2

Enter ID, Name, Salary: 101 Muni 50000
Enter Date of Joining (DD MM YYYY): 15 12 2020
Enter ID, Name, Salary: 102 Pooja 45000
Enter Date of Joining (DD MM YYYY): 01 01 2021

Employee Database:
ID: 101, Name: Muni, Salary: 50000.00, DOJ: 15-12-2020
ID: 102, Name: Pooja, Salary: 45000.00, DOJ: 01-01-2021

Key Points to Remember

  1. Use typedef to simplify structure names
  2. Use array of structures to store multiple records
  3. Nested structures help store related complex data (like date of joining)
  4. Always handle string input carefully to include spaces
  5. Useful for student management, employee databases, and real-world applications