CodeCapsule

C Projects

by

C Projects: Mini Examples for Practice

Once you understand C basics, functions, modular programming, and file handling, building small projects helps solidify knowledge and gain practical experience.

Here are some beginner-to-intermediate project ideas with examples.

1️⃣ Calculator Program (Modular)

Project Structure:

project/
├── include/
│ └── calculator.h
├── src/
│ ├── calculator.c
│ └── main.c

calculator.h

#ifndef CALCULATOR_H
#define CALCULATOR_H

int add(int a, int b);
int subtract(int a, int b);
int multiply(int a, int b);
float divide(int a, int b);

#endif

calculator.c

#include "calculator.h"

int add(int a, int b) { return a + b; }
int subtract(int a, int b) { return a - b; }
int multiply(int a, int b) { return a * b; }
float divide(int a, int b) { return b != 0 ? (float)a / b : 0; }

main.c

#include <stdio.h>
#include "calculator.h"

int main() {
int x = 10, y = 5;

printf("Add: %d\n", add(x, y));
printf("Subtract: %d\n", subtract(x, y));
printf("Multiply: %d\n", multiply(x, y));
printf("Divide: %.2f\n", divide(x, y));

return 0;
}

Compile & Run:

gcc src/main.c src/calculator.c -Iinclude -o calculator
./calculator

2️⃣ Number Guessing Game

  • Generates a random number between 1-100

  • User tries to guess until correct

  • Provides hints (higher/lower)

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

int main() {
srand(time(0));
int number = rand() % 100 + 1;
int guess;

printf("Guess the number (1-100):\n");

do {
scanf("%d", &guess);
if(guess > number) printf("Lower!\n");
else if(guess < number) printf("Higher!\n");
else printf("Correct! Number was %d\n", number);
} while(guess != number);

return 0;
}

3️⃣ File Handling Example: Student Record System

  • Store student names and marks in a file

  • Add, display, and search records

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

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

int main() {
FILE *fp = fopen("students.txt", "a+");
struct Student s;

printf("Enter Name and Marks: ");
scanf("%s %d", s.name, &s.marks);
fprintf(fp, "%s %d\n", s.name, s.marks);

rewind(fp);
printf("All Records:\n");
while(fscanf(fp, "%s %d", s.name, &s.marks) != EOF) {
printf("%s - %d\n", s.name, s.marks);
}

fclose(fp);
return 0;
}

4️⃣ Simple Banking System

  • Maintain account balance for multiple users

  • Deposit, Withdraw, Check Balance

  • Use structs and file handling

5️⃣ Dice Rolling Simulation

  • Simulates rolling two dice

  • Uses rand() and prints outcome

  • Can calculate probability statistics

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

int main() {
srand(time(0));
int dice1 = rand() % 6 + 1;
int dice2 = rand() % 6 + 1;

printf("Dice 1: %d\nDice 2: %d\n", dice1, dice2);
printf("Total: %d\n", dice1 + dice2);

return 0;
}

Tips for Building C Projects

  1. Use modular programming: separate header and source files

  2. Include comments and documentation

  3. Use Makefile for compilation automation

  4. Validate user input

  5. Use file handling for persistent data

  6. Use random numbers for games or simulations

  7. Test edge cases (division by zero, file not found, etc.)

CodeCapsule

Sanjit Sinha — Web Developer | PHP • Laravel • CodeIgniter • MySQL • Bootstrap Founder, CodeCapsule — Student projects & practical coding guides. Email: info@codecapsule.in • Website: CodeCapsule.in

You may also like...

Leave a Reply

Your email address will not be published. Required fields are marked *