Bucket Sort in C – Algorithm, Code, and Complexity Explained

Bucket sort is a distribution-based sorting algorithm that works by dividing elements into a fixed number of equally-sized ranges (buckets), sorting each bucket individually, then concatenating the results. It is particularly efficient for uniformly distributed floating-point values in [0, 1) and can approach O(n) average-case time — faster than comparison-based sorts like merge sort or …

C Program to Delete a File Using remove() — Safe Code with Error Handling

The remove() function in C deletes a file from the filesystem. Defined in <stdio.h>, it works on both Windows and Linux — making it the standard, portable way to delete files from a C program. Syntax int remove(const char *filename); filename is the path to the file — relative to the working directory (e.g. data.txt) …

C Program Without Using main – Preprocessor Macro Trick Explained

Every C program needs a main function — that is where the C runtime hands control to your code. But what if you want to write a program without typing main in the source? The answer is a preprocessor macro: #define maps any identifier you choose to main before compilation, so the compiler and linker …

ANSI Escape Codes in C – Control Terminal Cursor, Colors, and Position

ANSI escape codes let you control the terminal from a standard C program — hide or show the cursor, move it to any position, and print colored or styled text. Unlike the old DOS graphics.h approach that only worked in Turbo C, ANSI escape codes work on any POSIX terminal: Linux, macOS, and modern Windows …

Sort a String Alphabetically in C – Case-Sensitive and Case-Insensitive

To sort a string alphabetically in C, apply bubble sort to the character array: compare adjacent characters and swap them when the left character is greater than the right. After all passes, the characters are in ascending ASCII order — digits first, then uppercase A–Z, then lowercase a–z. For a sort that treats ‘A’ and …