Happy Codings - Programming Code Examples

C Programming Code Examples

C > Linked Lists Code Examples

Simple Linked List Program In C

Simple Linked List Program In C

#include <stdio.h>
#include <stdlib.h>

struct node {
   int data;
   struct node *next;
};

struct node *head = NULL;
struct node *current = NULL;

//display the list
void printList() {

   struct node *ptr = head;

   printf("\n[head] =>");
   //start from the beginning
   while(ptr != NULL) {        
      printf(" %d =>",ptr->data);
      ptr = ptr->next;
   }

   printf(" [null]\n");
}

//insert link at the first location
void insert(int data) {
   //create a link
   struct node *link = (struct node*) malloc(sizeof(struct node));

   //link->key = key;
   link->data = data;

   //point it to old first node
   link->next = head;

   //point first to new first node
   head = link;
}

int main() {
   insert(10);
   insert(25);
   insert(39);
   insert(1);
   insert(49);
   insert(56); 

   printList();
   return 0;
}

C Reverse an Array without using another - C reverse array without using another array relies on the above logic. What we need to do is maintain two array indexes. arrIndex that moves from size - 1 to 0. revIndex that moves

C Code Increment & Decrement Operators - C programming language has two operators increment ++ and decrement -- to change the value of an operand (constant or variable) by 1. Increment ++ increases value by 1 whereas

Pointer Simple Program Pass by Reference - C++ Language program sample which passes a "Reference" to a Function and Function has a 'pointer' as argument. Keep the return type void & display result in main body. Apply any

C Read a Grade and Display the Equivalent - C language program take the letter as input and store it in the variable grade. Convert the input letter into its uppercase using function toupper(). Using switch statement, verify the

C Language codings Relational Operators - A relational operator checks the relationship between two operands. If the relation is true, it returns 1; if the relation is false, it returns value 0. C program to demonstrate working

Program Sort Text data by rhyming order - Create a new node. First, we handle the case where 'data' should be the first element. Apperently this !IS! the first element. Now data should [be|becomes] the first element.

Coordinate Point in XY Coordinate System - C Program to read a coordinate point in a XY coordinate system & determine its quadrant. The program accepts X and Y. Depending on the Value of X & Y we need to Determine on

Find Whether a given year is Leap Year or - Takes a year as input and finds whether a year is leap year or not. Take a year as input. Check whether a given year is divisible by 400. Check whether a given year is divisible