Data Structres Basic Program

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

void insertion(int X,Node *l);
void display( Node *y);

void display(Node *y)
{
   printf("\n Your Node Contains \n Data : %d \t Pointer : %d \n ",y->data,y->sp);
}

void insertion(int X,Node *l)
{
   l->data=X;
   l->sp=NULL;
}

typedef struct 
{
   int data;
   int *sp;
}Node;

int main(void)
{
   int kl; Node *j;
   printf("\n Enter the data you like to put :");
   scanf("%d",&kl);
   insertion(kl,j);
   display(j);
   return 0;
}

There are errors during compilation - "Unknown Type Node "on Line 3,4,5,9. Why ? I am unable to rectify the Mistakes.i have only recently started data structures and this was just one node Data insertion Program.


The fix is pretty simple, you have to typedef your struct before you try to use it.

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

typedef struct // You cant use the Node keyword before this
{
    int data;
    int *sp;
}Node;

void insertion(int X,Node *l);
void display( Node *y);

void display(Node *y)
{
    printf("\n Your Node Contains \n Data : %d \t Pointer : %d \n ",y->data,y->sp);
}

void insertion(int X,Node *l)
{
    l->data=X;
    l->sp=NULL;
}


int main(void)
{
    int kl; Node *j;
    printf("\n Enter the data you like to put :");
    scanf("%d",&kl);
    insertion(kl,j);
    display(j);
    return 0;
}

Data Structures, What is data structure explain different types of data structures with examples? WAP program to construct a B Tree; WAP to Implement Binary Tree using Linked List; WAP for Depth First Binary Tree Search using Recursion; Perform Tree Operations – insert, traversal, preorder,post order and in order; c program to Create a Tree; Stack PUSH & POP Implementation using Arrays; Implement stack and perform push, and pop operations


When the compiler tries to compile the line

void insertion(int X,Node *l);

it does not know anything about Node. You have to move the declaration of Node before that line.

Move the lines

typedef struct 
{
   int data;
   int *sp;
}Node;

before that line.

Learn DS & Algorithms, Stacks, Queues and Lists. Stack implementation using arrays. Stack implementation using a Linked list. Balanced parenthesis checker. Redundant braces. Sorting a stack using a temporary stack. Infix to postfix using a stack. Infix to prefix using a stack. Queue using arrays. Basic Operations. The data in the data structures are processed by certain operations. The particular data structure chosen largely depends on the frequency of the operation that needs to be performed on the data structure. Traversing; Searching; Insertion; Deletion; Sorting; Merging


If you are using Node *j as linked list type then you need to allocate memory to it, then only you can assign any value to it. Otherwise it is just a pointer which points to some other variable.

What is Data Structure?, Most assembly languages and some low-level languages, such as BCPL (Basic Combined Programming Language), lack built-in support for data structures. In simple language, Data Structures are structures programmed to store ordered data, so that various operations can be performed on it easily. It represents the knowledge of data to be organized in memory.


First specify The Node Using Structure

First and foremost rule of using data structure is to define the data structure at the top of you program.Then only you can use it anywhere in your program.A sample program as follows:

using namespace std;
#include<iostream>
struct *node{
           int data;
            node *link;}top;             //top object created

Follow this method to minimize the error in your code

Data structure, The C Programming language has many data structures like an array, stack Now that you have understood the basics of Data Structures in C,  Structures (Visual Basic) A structure is a generalization of the user-defined type (UDT) supported by previous versions of Visual Basic. In addition to fields, structures can expose properties, methods, and events. A structure can implement one or more interfaces, and you can declare individual access levels for each field.


Data Types and Data Structures, Data Structures (DS) tutorial provides basic and advanced concepts of Data Structure, Linked List, Stack, Queue, Graph, Searching, Sorting, Programs, etc. Stack Data Structure (Introduction and Program) Stack is a linear data structure which follows a particular order in which the operations are performed. The order may be LIFO(Last In First Out) or FILO(First In Last Out).


Data Structures Programs in C, C++, Java and Python, Data structures are being used in almost every program or software system that has Given below are the 2 basic operations that can be performed on a stack. Data Structures are the programmatic way of storing data so that data can be used efficiently. Almost every enterprise application uses various types of data structures in one or the other way. This tutorial will give you a great understanding on Data Structures needed to understand the complexity of enterprise level applications and need of algorithms, and data structures.


Data structure, A famous quote: Program = Algorithms + Data Structures. In last series, we talked about 3 algorithms greedy, divide and conquer, dynamic programming to  A data structure is a particular way of organizing data in a computer so that it can be used effectively. For example, we can store a list of items having the same data-type using the array data structure. This page contains detailed tutorials on different data structures with topic-wise problems.