Collection of C programming projects solved in first year, organized by labs and practice exercises. This repository contains fundamental C programming concepts from basic I/O to advanced data structures.
📁 Lab 1: Basic Input/Output & Hello World
File
Description
HelloWorld.c First C program printing hello world and introduction
myInfo.c Display personal information (roll no., name, phone, percentage)
5sentence.c Print 5 sentences about personal background
📁 Lab 2: Basic Arithmetic Operations
File
Description
marksAvg.c Calculate sum and average of two marks
📁 Lab 3: Functions & Conditionals
File
Description
project1.c Conditional logic with function calls (if-else)
project2.c Factorial calculation using recursive functions
project3.c Count vowels and consonants in a string
23.c Hello world using function calls
📁 Lab 4: Geometric Calculations
File
Description
E5.c Calculate area and circumference of a circle
E6.c Calculate triangle area using Heron's formula
E7.c Calculate simple interest with fixed rate (8%)
E8.c Calculate compound interest using power function
📁 Lab 5: Conditional Statements
File
Description
E13.c Check if number is divisible by 3 or 5
E14.c Determine if character is uppercase, lowercase, or digit
E15.c Check if number is positive, negative, or zero
E16.c Check voting eligibility based on age (≥18)
📁 Lab 6: Switch Statements & Loops
File
Description
E18.c Check if number is odd or even using switch
E19.c Calculator using switch for arithmetic operations
E20.c Salary calculator with increment percentages
E21.c Convert day number to day name (1=Sunday...7=Saturday)
E22.c Assign grade based on marks using switch
E23.c Find greatest number among three using ternary operator
program12.c Sum of n integers input by user
program13.c Factorial calculation using loop
program14.c Matrix input and display
📁 Lab 7: Nested Loops & Patterns
File
Description
16A.c Print right-aligned star triangle pattern
16B.c Print center-aligned star triangle pattern
16C.c Print alphabet triangle pattern (A, B, C...)
16D.c Print spaced star triangle pattern
16e.c Print alphabet triangle with spacing
16F.c Print alphabet triangle with decreasing pattern
16G.c Print diamond pattern using hash symbols
E24.c Calculate factorial using loop
E25.c Display ASCII character table (all 256 values)
E26.c Print multiplication table for a given number
P17.c Calculate GCD and LCM of two numbers
📁 Lab 8: Series Calculations & Number Analysis
File
Description
E27.c Sum of harmonic series: 1+1/2+1/3+...+1/n
E28.c Sum of alternating series: 1²-3²+5²-7²+...
E29.c Sum of squares: 1²+2²+3²+...+n²
E30.c Sum of power series with custom base and exponents
E31.c Calculate sum of all digits in a number
E32.c Check if number is Armstrong number (narcissistic)
E33.c Sum integers until 0 is entered (do-while loop)
E34.c Convert character case until '$' is entered
📁 Lab 9: Arrays & Array Operations
File
Description
E35.c Input and display array elements
E36.c Sort array using bubble sort algorithm
E37.c Count even, odd, and prime numbers in array
E38.c Find largest and smallest numbers in array
E39.c Reverse an array
E40.c Merge two arrays
E41.c Search element in array (linear search)
E42.c Copy array to another array
E43.c Swap two arrays
E44.c Insert element at specified location in array
E45.c Delete element from array
P18.c Calculate sum and average of 10 numbers
P19.c Find largest number in array
📁 Lab 10: 2D Arrays & Matrix Operations
File
Description
E45.c Matrix input and display
E46.c Matrix addition operations
E47.c Matrix input and print
E48.c Matrix transpose (rotate rows and columns)
E49.c Sum of lower triangle matrix
E50.c Sum of upper triangle matrix
E51.c Sum of diagonal elements
E52.c Sum of all matrix elements
E53.c Check if matrix is magic square
E54.c 3x3 matrix multiplication
📁 Lab 11: String Operations
File
Description
E56.c Convert string to uppercase (manual method)
E57.c Count vowels in a string
E58.c Find frequency of a character in string
E59.c Convert string to uppercase (using toupper)
E60.c Convert string to lowercase (using tolower)
E61.c Copy string using strcpy()
E62.c Concatenate two strings using strcat()
E63.c Calculate string length using strlen()
E64.c Reverse string using strrev()
lab 11 E68.c Display reversed string
p20.c Check if string is palindrome
p21.c Find character frequency in string
p22.c Calculate string length (manual count)
📁 Lab 12: Advanced String & Data Operations 📁 Practice Folder: Additional Practice Programs
Topic
Concepts
Files
Basic I/O printf, scanf, output formatting
Lab 1-2
Data Types & Variables int, float, char, arrays, operators
All labs
Control Flow if-else, switch-case, ternary operator
Lab 5-6
Loops for, while, do-while, nested loops
Lab 6-8
Functions Declaration, definition, recursion, parameters
Lab 3, 7
Arrays 1D arrays, array operations, sorting, searching
Lab 9
2D Arrays/Matrices Matrix operations, transpose, addition, multiplication
Lab 10
Strings String input/output, manipulation, case conversion
Lab 11-12
Mathematical Operations Series summation, interest calculations, number properties
Lab 4, 8
Patterns & ASCII Pattern printing, ASCII values, character operations
Lab 7
Navigate to any lab folder to view programs for specific topics
Each file contains C code with comprehensive comments explaining the program's purpose
Use these programs to understand fundamental C concepts progressively
Compile and run: gcc filename.c -o output && ./output
Beginners : Start with Lab 1 → Lab 2 → Lab 3 → Lab 4Control Flow : Lab 5 → Lab 6 → Lab 7Data Structures : Lab 9 (Arrays) → Lab 10 (Matrices) → Lab 11-12 (Strings)Practice : Check the Practice Folder for supplementary exercises
Metric
Count
Total Labs
12
Total Files
100+
Difficulty Level
Beginner to Intermediate
Programming Language
C