#include <stdio.h>
#include <stdlib.h>
struct Node
{
int data;
struct Node *next;
};
struct Node *head;
void InsertBeg()
{
struct Node *ptr, *temp;
int item;
ptr = (struct Node *)malloc(sizeof(struct Node));
if (ptr == NULL)
{
printf("\nOVERFLOW");
}
else
{
printf("\nEnter the Node data?");
scanf("%d", &item);
ptr->data = item;
if (head == NULL)
{
head = ptr;
ptr->next = head;
}
else
{
temp = head;
while (temp->next != head)
temp = temp->next;
ptr->next = head;
temp->next = ptr;
head = ptr;
}
printf("\nNode inserted\n");
}
}
void InsertLast()
{
struct Node *ptr, *temp;
int item;
ptr = (struct Node *)malloc(sizeof(struct Node));
if (ptr == NULL)
{
printf("\nOVERFLOW\n");
}
else
{
printf("\nEnter Data?");
scanf("%d", &item);
ptr->data = item;
if (head == NULL)
{
head = ptr;
ptr->next = head;
}
else
{
temp = head;
while (temp->next != head)
{
temp = temp->next;
}
temp->next = ptr;
ptr->next = head;
}
printf("\nNode inserted\n");
}
}
void DeleteFirst()
{
struct Node *ptr;
if (head == NULL)
{
printf("\nUNDERFLOW");
}
else if (head->next == head)
{
head = NULL;
free(head);
printf("\nNode deleted\n");
}
else
{
ptr = head;
while (ptr->next != head)
ptr = ptr->next;
ptr->next = head->next;
free(head);
head = ptr->next;
printf("\nNode deleted\n");
}
}
void DeleteLast()
{
struct Node *ptr, *preptr;
if (head == NULL)
{
printf("\nUNDERFLOW");
}
else if (head->next == head)
{
head = NULL;
free(head);
printf("\nNode deleted\n");
}
else
{
ptr = head;
while (ptr->next != head)
{
preptr = ptr;
ptr = ptr->next;
}
preptr->next = ptr->next;
free(ptr);
printf("\nNode deleted\n");
}
}
void Search()
{
struct Node *ptr;
int item, i = 0, flag = 1;
ptr = head;
if (ptr == NULL)
{
printf("\nEmpty List\n");
}
else
{
printf("\nEnter item which you want to Search?\n");
scanf("%d", &item);
if (head->data == item)
{
printf("item found at location %d", i + 1);
flag = 0;
}
else
{
while (ptr->next != head)
{
if (ptr->data == item)
{
printf("item found at location %d ", i + 1);
flag = 0;
break;
}
else
{
flag = 1;
}
i++;
ptr = ptr->next;
}
}
if (flag != 0)
{
printf("Item not found\n");
}
}
}
void Display()
{
struct Node *ptr;
ptr = head;
if (head == NULL)
{
printf("\nnothing to print");
}
else
{
printf("\n printing values ... \n");
while (ptr->next != head)
{
printf("%d\n", ptr->data);
ptr = ptr->next;
}
printf("%d\n", ptr->data);
}
}
void main()
{
int choice = 0;
while (choice != 7)
{
printf("\n*********Main Menu*********\n");
printf("\nChoose one option from the following list ...\n");
printf("\n===============================================\n");
printf("\n1.Insert in begining\n2.Insert at last\n3.Delete from Beginning\n4.Delete from last\n5.Search for an element\n6.Show\n7.Exit\n");
printf("\nEnter your choice?\n");
scanf("\n%d", &choice);
switch (choice)
{
case 1:
InsertBeg();
break;
case 2:
InsertLast();
break;
case 3:
DeleteFirst();
break;
case 4:
DeleteLast();
break;
case 5:
Search();
break;
case 6:
Display();
break;
case 7:
exit(0);
break;
default:
printf("Please enter valid choice..");
}
}
}
Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'C' and start coding!
OneCompiler's C online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample C program which takes name as input and print your name with hello.
#include <stdio.h>
int main()
{
char name[50];
printf("Enter name:");
scanf("%s", name);
printf("Hello %s \n" , name );
return 0;
}
C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.
When ever you want to perform a set of operations based on a condition if-else is used.
if(conditional-expression) {
// code
} else {
// code
}
You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to if-else-if ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type array-name[size];
data-type array-name[size][size];
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
Two types of functions are present in C
Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,
User defined functions are the ones which are written by the programmer based on the requirement.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
//code
}