C Programming Code: C Programs

C Programming Code is a collection of 82 complete C programs with output, for students and beginners who learn best from examples.
Every C program is ready to copy, compile and run, comes with a real sample run and explains how the code works. It all works offline.

These are not snippets: each of the 82 C programming examples is a full program in standard C (C17) that compiles without warnings, followed by the output of a real run and a plain-language explanation.

C programs in the app (11 sections)

• Basics: how to compile and run, Hello World, reading input safely with scanf and fgets, arithmetic operators, swap two numbers, sizes and ranges of data types, character codes (ASCII)
• Conditions: even or odd, vowel or consonant, leap year check, largest of three numbers, grade calculator, roots of a quadratic equation
• Loops and Numbers: sum and average of n numbers, multiplication table, sum of digits, reverse a number, palindrome number, factorial, Fibonacci series, prime number check, Sieve of Eratosthenes, Armstrong numbers, GCD (HCF) and LCM, nCr and nPr, power of a number, perfect numbers
• Pattern programs: star and number triangles, star pyramid, diamond pattern, hollow square, Floyd's triangle, Pascal's triangle
• Number Systems: decimal to binary, binary to decimal, decimal to octal and hexadecimal, hexadecimal to decimal, bitwise operators
• Arrays: sum and average, largest and smallest element, reverse an array, insert and delete an element, linear search, binary search, bubble sort, selection sort, insertion sort, merge two sorted arrays, frequency count, remove duplicates
• Matrices: matrix addition and subtraction, matrix multiplication, transpose of a matrix, 2 × 2 and 3 × 3 determinants
• Strings: string length, reverse a string, palindrome string, count vowels and consonants, change case, count words, lines and characters, concatenate, compare and copy strings, anagram check, remove spaces, vowels or punctuation, string to integer
• Pointers and Functions: pointer basics, swap with pointers, arrays and pointers, dynamic array with malloc and realloc, function pointers and qsort, recursion examples, Tower of Hanoi
• Structures and Files: student records, complex numbers, write and read a text file, count lines and words in a file, copy a file
• Simple Projects: calculator, temperature converter, bank account menu, number guessing game, tic-tac-toe

Each C program page has
• the full source code, ready to copy and run
• a sample run from the real program, with the typed input highlighted
• a clear "how it works" explanation, with tables and diagrams where they help
• notes on common mistakes: integer overflow, buffer overflows, unsafe input and undefined behaviour
• links to related programs

Features
• 82 C programs with output in 11 sections
• 13 diagrams for sorting, searching, matrices, pointers and recursion
• Search across all programs from the home screen
• Dark mode
• Works offline, no account needed
• Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia (explanations are translated; the C code stays the same)

Who it is for
• Students learning C at school, college or university who want working C code to study
• Beginners who understand a concept better after seeing a complete C program and its output
• Anyone preparing for C programming lab exams and practical tests
• Learners of the C Programming tutorial app who want more practice programs

The programs are original and were tested with a C17 compiler. C Programming Code is an independent study aid; it is not affiliated with any compiler vendor, university or standards body.