C Program to Check File Size – fseek/ftell and stat()

There are two standard ways to check file size in C: the portable fseek()/ftell() method that works with any FILE pointer, and the POSIX stat() method that reads file metadata without opening the file. This page covers both, with complete working programs, a comparison table, and when to use each. Method 1 — fseek() and …

C Program to implement address calculation sort.

Write a C Program to implement address calculation sort.Address calculation sort is the sorting method which sorts the given array by using insertion method.In this algorithm, a hash function is used and applied to the each key. Result of hash function is placed in the linked lists. The hash function must be a order preserving …

C Program to solve Dining philosophers problem.

Write a C Program to solve Dining philosophers problem.Dining philosophers problem is a classic synchronization problem.A problem introduced by Dijkstra concerning resource allocation between processes. Five silent philosophers sit  around table with a bowl of spaghetti. A fork is placed between each pair of adjacent philosophers. Each philosopher must alternately think and eat.Eating is not …

C Program to demonstrate dynamic memory allocation example.

Write a C Program to demonstrate dynamic memory allocation example.Dynamic memory allocation means you can allocate or relocate (manipulate) the memory at the run time, using malloc, calloc, and realloc functions.Using malloc, We can allocate block of memory for a variableUsing calloc function, We can allocate multiple blocks of memory for a variable.We can alter, …

C Program to Print Prime Numbers in a Given Range – Trial Division and Sieve

This C program generates and prints all prime numbers in a given range and reports the total count. It uses an efficient is_prime() function with a √n bound, plus a Sieve of Eratosthenes for cases where you need all primes up to a large limit. Trial Division — Check Each Number in the Range For …

C Program to copy and concatenate strings without using standard functions.

C Program to copy and concatenate strings without using standard functions.In this program , we copy one string from another, and without using the standard library function strcpy from string.h .Here we appends the one string to another without using the strcat function. Read more about C Programming Language . /************************************************************ You can use all …