C Programming – Day 12 | Final Projects & Revision Apply Your Learning Beginner to Advanced

FINAL PROJECTS AND REVISION

DAY - 12

Learn C Programming Day 12 with final projects and revision. Apply everything you’ve learned from Day 1 to Day 11, practice real-world examples, and strengthen your understanding of C programming concepts.

✅ We are now at Day-12 — Final Projects & Revision 🚀

This is the last day of our C Programming Full Course.

---

📍 Day-12 — Final Projects & Revision

Today you will learn:

✅ Revision of all topics (Day 1 → Day 11)
✅ Mini Projects using combined concepts
✅ How to build a professional C project step-by-step
✅ Task + Quiz

---

✅ 1️⃣ Quick Revision

Module	Key Concepts
Day-1	Basic I/O, Variables, Data Types
Day-2	Operators & Expressions
Day-3	Conditional Statements (if, else, switch)
Day-4	Loops (for, while, do-while)
Day-5	Arrays (1D & 2D)
Day-6	Strings & String Functions
Day-7	Functions (Parameters & Return)
Day-8	Pointers & Pointer Functions
Day-9	Structures & Array of Structures
Day-10	File Handling (Text Files)
Day-11	Dynamic Memory Allocation (malloc, calloc, realloc, free)

---

✅ 2️⃣ Mini Project Ideas

Here are some projects combining multiple concepts:

1️⃣ Student Management System

• Use structures for student data

• Use arrays or dynamic memory

• File save/load student records

2️⃣ Bank Account Management

• Functions for deposit/withdraw

• Arrays/structures for accounts

• File storage optional

3️⃣ Simple Calculator

• Functions for add, subtract, multiply, divide

• Use loops and switch-case for menu

4️⃣ Contact Book

• Store names, numbers in structure

• File handling to save contacts

• Search by name

---

✅ 3️⃣ Example: Student Marks System (Mini Project)

#include <stdio.h>
#include <stdlib.h>

struct Student {
    char name[30];
    int marks;
};

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

    struct Student *s = (struct Student*) malloc(n * sizeof(struct Student));

    for(int i=0; i<n; i++){
        printf("Enter name & marks: ");
        scanf("%s %d", s[i].name, &s[i].marks);
    }

    printf("\nStudent Details:\n");
    for(int i=0; i<n; i++){
        printf("%s %d\n", s[i].name, s[i].marks);
    }

    free(s);
    return 0;
}

---

✅ Task-12 (Final Project)

Build a Simple Student Management System:

✔ Input number of students
✔ Input Name, Age, Marks for each student (use structure)
✔ Save records in a file
✔ Display all records from file
✔ Calculate average marks

📌 This project will combine structures, arrays, loops, functions, file handling, and dynamic memory

---

📝 Quick Quiz — Day-12

Reply like: 1A, 2B, 3C

1️⃣ Which data type stores multiple variables of different types?
A) Structure
B) Array
C) Pointer

2️⃣ Which C concept is used to allocate memory at runtime?
A) malloc
B) struct
C) for loop

3️⃣ To read a line of text including spaces from a file, we use:
A) fscanf()
B) fgets()
C) printf()

---

📌 Final Reminder:

Send your Task-12 Code and Day-12 Quiz Answers, and I will compile your full PDF course including:

• All lessons (Day-1 → Day-12)

• Your solved tasks

• Quiz answers

BUILD ANY C PROJECT STEP BY STEP

✅ Let’s build a step-by-step C project combining everything you’ve learned so far (Day 1 → Day 12).

We’ll create a Simple Student Management System — it’s perfect because it uses:

• Variables & Data Types

• Operators & Expressions

• Conditional Statements

• Loops

• Arrays & 2D Arrays

• Strings

• Functions

• Pointers

• Structures

• File Handling

• Dynamic Memory Allocation

---

🏗 Step-by-Step Project: Student Management System

---

Step 1 — Include Headers & Define Structure

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

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

✅ We include stdio.h for input/output, stdlib.h for dynamic memory, string.h for string operations.

---

Step 2 — Function Prototypes

void inputStudent(struct Student *s, int n);
void displayStudent(struct Student *s, int n);
float calculateAverage(struct Student *s, int n);
void saveToFile(struct Student *s, int n, const char *filename);
void readFromFile(const char *filename);

✅ Functions make the project organized and reusable.

---

Step 3 — Main Function & Dynamic Memory Allocation

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

    struct Student *s = (struct Student*) malloc(n * sizeof(struct Student));

    inputStudent(s, n);
    displayStudent(s, n);

    printf("Average Marks: %.2f\n", calculateAverage(s, n));

    saveToFile(s, n, "students.txt");

    printf("\nData from file:\n");
    readFromFile("students.txt");

    free(s); // Free dynamic memory
    return 0;
}

✅ We dynamically allocate memory for students based on user input.

---

Step 4 — Input Function

void inputStudent(struct Student *s, int n){
    for(int i=0; i<n; i++){
        printf("Enter name, age, marks of student %d: ", i+1);
        scanf("%s %d %f", s[i].name, &s[i].age, &s[i].marks);
    }
}

---

Step 5 — Display Function

void displayStudent(struct Student *s, int n){
    printf("\nStudent Details:\n");
    for(int i=0; i<n; i++){
        printf("Name: %s, Age: %d, Marks: %.2f\n", s[i].name, s[i].age, s[i].marks);
    }
}

---

Step 6 — Calculate Average Function

float calculateAverage(struct Student *s, int n){
    float sum = 0;
    for(int i=0; i<n; i++){
        sum += s[i].marks;
    }
    return sum / n;
}

---

Step 7 — Save to File

void saveToFile(struct Student *s, int n, const char *filename){
    FILE *fp = fopen(filename, "w");
    if(fp == NULL){
        printf("Error opening file!\n");
        return;
    }
    for(int i=0; i<n; i++){
        fprintf(fp, "%s %d %.2f\n", s[i].name, s[i].age, s[i].marks);
    }
    fclose(fp);
    printf("Data saved to file successfully!\n");
}

---

Step 8 — Read from File

void readFromFile(const char *filename){
    FILE *fp = fopen(filename, "r");
    if(fp == NULL){
        printf("Error opening file!\n");
        return;
    }
    char name[50];
    int age;
    float marks;
    while(fscanf(fp, "%s %d %f", name, &age, &marks) != EOF){
        printf("Name: %s, Age: %d, Marks: %.2f\n", name, age, marks);
    }
    fclose(fp);
}

---

✅ How This Project Uses All Concepts

Concept	Usage
Variables & Data Types	int, float, char[]
Operators	+, / for average calculation
Conditional	File error checking (if(fp == NULL))
Loops	for loops to input/display students
Arrays	Array of struct Student
Strings	char name[50], scanf() & fprintf()
Functions	inputStudent(), displayStudent(), etc.
Pointers	struct Student *s dynamic array
Structures	struct Student
File Handling	fopen, fprintf, fscanf, fclose
Dynamic Memory	malloc(), free()

---

This is a complete, real-world mini project.

✅ You can run it, add more features (search student, update marks, delete records, etc.), and learn advanced C programming!

Features:

• Each day includes:
  ✅ Theory & explanation
  ✅ Example code
  ✅ Mini-task & solution
  ✅ Quick Quiz

• Full step-by-step guidance from Beginner → Advanced

• Final Project: Student Management System included with code

Learn C Programming Day 12 with final projects and revision. Apply everything you’ve learned from Day 1 to Day 11, practice real-world examples, and strengthen your understanding of C programming concepts.

CAN YOU START YOUR JOURNEY, I CAN HELP YOU WITH ANY PAID COURSE IN FREE. YOU JUST SAY 'YES' AND CONTUCT ME.

THANK YOU