## Threaded Binary Tree and its implementation in C

Threaded Binary Trees are those in which the NULL right pointers of all nodes are THREADED to its immediate inorder successor in the Binary Tree. Such pointers or THREADS are also called RIGHT IN threads as they are always threaded to right. Example Structure of a Threaded Binary Tree A / \ B C / \…

## Traversing a Binary Tree in C

There are generally 3 traversal strategies for Binary Trees – INORDER, PREORDER and POSTORDER. For eg:, the inorder, preorder and postorder traversal of an expression tree gives the infix, prefix and postfix forms of the expression. Such a traversal could be used to evaluate the value of expression. Example 1 : Consider the following Binary Tree –…

## C program implementing Binary Tree Search to find duplicates of a file

A Binary Search is such a Binary Tree in which the info field of any of the nodes to the left of a particular node nd will be < that of nd and of those to the right of nd will be >= nd. The in-order traversal of such a tree will give the sorted form…

## Binary Tree representation and Primitive Operations on a Binary Tree in C

Binary Trees are one of the core data structures used in any programming language to implement complex systems. C programming language offers various binary tree operations that could be used by the developer. Binary Trees can be dynamically represented in C as shown below – struct nodetype{ int info; struct nodetype * left; struct nodetype * right;…

## C program to print sum up-to each individual preceding number until the entered number

Here is a C program which accepts an integer and prints out sum from 1 to 1, 1 to 2, 1 to 3 …… 1 up-to that number – main(){ int n,i,s=0; printf(“\nEnter any integer>>”); scanf(“%d”,&n); for(i = 1; i

## C program for Hailstones series

Hailstones is a sequence of numbers that could be generated from any positive number by performing a specific operation on it until it reaches 1. The fact is that any positive number will reach 1 if we perform this operation. If the number is even, we divide it by 2, otherwise we multiply the number…

## C program to generate random numbers in any range

Here is a C program to generate random numbers between any range of two digit numbers – #include #include main(){ int s, a, b, n, ran; srand(time(0)); // this is to set the seed to current time so we get different random numbers in each try printf(“\nEnter lower limit>>”); scanf(“%d”,&a); printf(“\nEnter upper limit>>”); scanf(“%d”,&b); printf(“\nEnter…

## for loops in C

The ‘for’  loop is another important looping structure which could replace ‘while’  and ‘do .. while’ loops. It has a special feature that the initialization, test condition and the increment or decrements of test variable could be placed in a single line following the ‘for’ keyword as shown below – for (initialization; test condition; change…

## C program to test for a prime number

Below is a C program to test for a prime number – main(){ float n, count = 0; i = 3; a; printf(“\nEnter any number of your choice>>”); scanf(“%f”, &n); if(n == 0 || n == 1 || n == 2) printf(“\n%d is not a prime number\n”, n); while(i > 2 & i < n){...

## C program to implement Russian Peasant

Here is a C program that I wrote years back to implement Russian Peasant method of an interesting multiplication technique – main(){ int a, b, sum = 0; printf(“\nEnter the two digits to be multiplied separated by space>> “); scanf(“%d %d”, &a, &b); printf(“%d “,a); printf(” %d\n”,b); do{ if(a % 2) sum += b; else…