C Program to Construct a Tree and Perform Tree Operations

This C Program constructs Tree & Perform Insertion, Deletion, Display.

Here is source code of the C Program to construct a Tree & Perform Insertion, Deletion, Display. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to Construct a Tree & Perform Insertion, Deletion, Display

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 */ 
```
```
#include <stdio.h>
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```
#include <stdlib.h>
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```
 
```
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struct btnode
```
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{
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```
    int value;
```
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    struct btnode *l;
```
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    struct btnode *r;
```
```
}*root = NULL;
```
```
 
```
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// Function Prototype
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void printout(struct btnode*);
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struct btnode* newnode(int);
```
```
 
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void main()
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{
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```
    root=newnode(50);
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    root->l=newnode(20);
```
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    root->r=newnode(30);
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```
    root->l->l=newnode(70);
```
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    root->l->r=newnode(80);
```
```
    root->l->r->r=newnode(60);
```
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    root->l->l->l=newnode(10);
```
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    root->l->l->r=newnode(40);
```
```
    printf("tree elements are\n");
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    printf("\nDISPLAYED IN INORDER\n");
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    printout(root);
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    printf("\n");
```
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}
```
```
 
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// Create a node
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struct btnode* newnode(int value)
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{
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    struct btnode* node = (struct btnode*)malloc(sizeof(struct btnode));

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    node->value = value;
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    node->l = NULL;
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    node->r = NULL;
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    return(node);
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}
```
```
 
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// to display the tree in inorder
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void printout (struct btnode *tree)
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{
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    if (tree->l)
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        printout(tree->l);
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    printf("%d->", tree->value);
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    if (tree->r)
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        printout(tree->r);
```
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}
```

$ gcc tree1.c
$ a.out
tree elements are
 
DISPLAYED IN INORDER
10->70->40->20->80->60->50->30

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