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Introduction to C Programming - Assignments and Practice

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📌 Overview

This repository contains a collection of C programming assignments, modules, and practice problems designed for learning and mastering C programming concepts.

It covers fundamental to intermediate topics through structured modules and includes exam problems, HackerRank challenges, and Codeforces practice suitable for students preparing for labs, exams, and competitive programming.

🎯 Objectives

  • Learn C programming through practical assignments and modules
  • Understand program structure, logic, and syntax
  • Practice problem-solving with exam questions and coding challenges
  • Prepare for university exams, HackerRank, and Codeforces
  • Build skills in arrays, strings, functions, pointers, and recursion

🛠 Requirements

  • Compiler: GCC / MinGW / Turbo C
  • IDE: VS Code / CodeBlocks / Dev-C++
  • Operating System: Windows / Linux / macOS

📂 Project Structure

Introduction_C_Programming/
│
├── Assignmemt_00_module_12_midterm_exam/
│   ├── Count_me_04_p06.c
│   ├── count_me_p01.c
│   ├── count_me_p02.c
│   ├── Count_me03_p04.c
│   ├── Do_it_p05.c
│   ├── Farmers_p03.c
│   └── Tell_Me_p07.c
│
├── Assignment_00_Module_20_Final_Exam/
│   ├── p_01_Tiger_vs_Pathan.c
│   ├── p_02_Find_the_Missing_Number.c
│   ├── p_03_Jadu_Matrix.c
│   ├── p_04.c
│   ├── p_05_pattern.c
│   └── p_06.c
│
├── Assignment_01_Hackerrank/
│   ├── p01.c
│   ├── p02.c
│   ├── P03.C
│   ├── p04.c
│   └── p05.c
│
├── Assignment_02_Hackerrank/
│   ├── is_it_challenge_p02.c
│   ├── Reverse_And_Odd_03.c
│   ├── say_it_p01.c
│   ├── sum_sum_p04.c
│   └── update_&_print_05.c
│
├── Assignment_03_Hakerrank/
│   ├── count_before_one.c
│   ├── Even_&_odd_.c
│   ├── palindrom_p04.c
│   ├── pattern_01.c
│   └── pattern_02.c
│
├── char/
│
├── string/
│
├── module_01/
│
├── module_02_Conditional/
│   ├── conditional01.c
│   ├── conditional02.c
│   ├── conditional04.c
│   ├── nestedifelse03.c
│   └── operator.c
│
├── module_03_Loop/
│   ├── 10To1print.c
│   ├── break.c
│   ├── continue.c
│   ├── evenNumber.c
│   ├── loop01.c
│   ├── LoopWithCodition.c
│   ├── oddNumber.c
│   ├── sum1To5.c
│   ├── sum1ToN.c
│   └── sumNtoM.c
│
├── Module_05_(Codeforces)/
│   ├── p01.c
│   ├── p02.c
│   ├── p03.c
│   ├── p04.c
│   ├── p05.c
│   ├── p06
│   └── P06.C
│
├── module_06/
│   ├── B_Even_Numbers.c
│   ├── C_Even_Odd_Positive_and_Negative.c
│   ├── D_Fixed_Password.c
│   ├── E_Max.c
│   ├── F_Multiplication_table.c
│   └── Q_Digits.c
│
├── Module_07_Array/
│   ├── 1D_matrix.c
│   ├── 2D_Array_matrix_sum.c
│   ├── 2D_Array_Multiplication.c
│   ├── 2D_Array_sum_of_diagonal.c
│   ├── 2D_Array_sum_of_upper_&_lower_triangle_elements.c
│   ├── 2D_Array_Transpose_Matrix.c
│   ├── array_declare_01.c
│   ├── Array_initialization.c
│   ├── Array_input_&_output_02.c
│   ├── Array_input_&_output_03.c
│   └── ... (more files)
│
├── Module_09_Array _oparation/
│   └── ... (array operations)
│
├── Module_10_String/
│
├── Module_10.5_practice_day/
│
├── module_11_string_oparation_&_frequency_Array/
│
├── module_11.5/
│
├── Module_13_nested_loop_pattern/
│
├── Module_13_pattern/
│
├── module_13_special_Array_problem/
│
├── Module_14_Builting_Function/
│
├── Module_14_Function/
│
├── module_14_function_pointer/
│
├── Module_14.5_practice_Day_01/
│
├── Module_15_Pointer/
│
├── Module_15.5_practice_day_02/
│
├── Module_17_Recuesion_part_01/
│
├── Module_18_2D_Array/
│
├── module_18.5_pratice_day_01/
│
├── Module_19_2D_Aray_&_Recursion_part_02/
│
├── Module_19.5_practice_day_02/
│
├── module_2.5_practice_Day/
│
├── module_3.5_contest/
│
├── Module_6.5_practice_day/
│
├── module_7.5_practice_codeforces/
│
└── README.md

📘 Topics Covered

🔹 Module 01: Basics of C

  • Program structure
  • Keywords & identifiers
  • Variables & data types
  • Input / Output (scanf, printf)

🔹 Module 02: Conditional Statements

  • if / if-else
  • Nested if-else
  • Operators

🔹 Module 03: Loops

  • for, while, do-while loops
  • break and continue
  • Loop with conditions
  • Sum calculations

🔹 Module 05: Codeforces Problems

  • Problem-solving challenges

🔹 Module 06: Basic Programming Problems

  • Even numbers, odd/even/positive/negative
  • Max values, multiplication tables
  • Digits operations

🔹 Module 07 & 09: Arrays

  • One-dimensional arrays
  • Two-dimensional arrays
  • Array operations (sum, multiplication, transpose)
  • Diagonal and triangle elements

🔹 Module 10 & 11: Strings

  • String handling
  • String operations
  • Frequency arrays

🔹 Module 13: Patterns

  • Nested loop patterns
  • Special array problems

🔹 Module 14: Functions

  • User-defined functions
  • Built-in functions
  • Function pointers

🔹 Module 15: Pointers

  • Pointer basics
  • Pointer arithmetic
  • Pointer with arrays

🔹 Module 17 & 19: Recursion

  • Recursion part 1 and 2
  • Recursion with 2D arrays

🔹 Assignments

  • Midterm exam problems
  • Final exam problems
  • HackerRank challenges
  • Codeforces practice

🔹 Practice Days

  • Regular practice sessions
  • Contests
  • Problem-solving exercises

▶ How to Compile and Run

Using GCC (Linux / macOS)

gcc program.c -o program
./program

Using MinGW (Windows)

gcc program.c -o program.exe
program

🧪 Sample Output

Enter two numbers: 10 20
Sum = 30

✅ Learning Outcomes

After completing this repository, you will be able to:

  • Write C programs for various problem types
  • Understand control structures, loops, and conditional statements
  • Work with arrays, strings, functions, and pointers
  • Solve recursion problems and 2D array operations
  • Tackle competitive programming challenges on platforms like HackerRank and Codeforces

📚 References

  • Dennis Ritchie – The C Programming Language
  • GeeksforGeeks – C Programming
  • TutorialsPoint – C Language

👨‍💻 Author

Md. Emon Hossain BSc in Computer Science & Engineering Daffodil International University

⭐ If you find this repository useful, please star it on GitHub!