C Programming Code Examples
C > Linked Lists Code Examples
C Program to Implement Binary Tree using Linked List
/* C Program to Implement Binary Tree using Linked List
This C Program implements binary tree using linked list. Binary Search tree is a binary tree in which each internal node x stores an element such that the element stored in the left subtree of x are less than or equal to x and elements stored in the right subtree of x are greater than or equal to x. This is called binary-search-tree property */
#include <stdio.h>
#include <malloc.h>
struct node {
struct node * left;
char data;
struct node * right;
};
struct node *constructTree( int );
void inorder(struct node *);
char array[ ] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', '\0', '\0', 'H' };
int leftcount[ ] = { 1, 3, 5, -1, 9, -1, -1, -1, -1, -1 };
int rightcount[ ] = { 2, 4, 6, -1, -1, -1, -1, -1, -1, -1 };
void main() {
struct node *root;
root = constructTree( 0 );
printf("In-order Traversal: \n");
inorder(root);
}
struct node * constructTree( int index ) {
struct node *temp = NULL;
if (index != -1) {
temp = (struct node *)malloc( sizeof ( struct node ) );
temp->left = constructTree( leftcount[index] );
temp->data = array[index];
temp->right = constructTree( rightcount[index] );
}
return temp;
}
void inorder( struct node *root ) {
if (root != NULL) {
inorder(root->left);
printf("%c\t", root->data);
inorder(root->right);
}
}
#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program. Here are the two types of file that can be included using #include:
Allocate memory block. Allocates a block of size bytes of memory, returning a pointer to the beginning of the block. The content of the newly allocated block of memory is not initialized, remaining with indeterminate values. If size is zero, the return value depends on the particular library implementation (it may or may not be a null pointer), but the returned pointer shall not be dereferenced. The "malloc" or "memory allocation" method in C is used to dynamically allocate a single large block of memory with the specified size. It returns a pointer of type void which can be cast into a pointer of any form. It doesn't Iniatialize memory at execution time so that it has initializes each block with the default garbage value initially.
Writes the C string pointed by format to the standard output (stdout). If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. printf format string refers to a control parameter used by a class of functions in the input/output libraries of C programming language. The string is written in a simple template language: characters are usually copied literally into the function's output, but format specifiers, which start with a % character, indicate the location and method to translate a piece of data (such as a number) to characters. "printf" is the name of one of the main C output functions, and stands for "print formatted". printf format strings are complementary to scanf format strings, which provide formatted input (parsing). In both cases these provide simple functionality and fixed format compared to more sophisticated and flexible template engines or parsers,
The if-else statement is used to perform two operations for a single condition. The if-else statement is an extension to the if statement using which, we can perform two different operations, i.e., one is for the correctness of that condition, and the other is for the incorrectness of the condition. Here, we must notice that if and else block cannot be executed simiulteneously. Using if-else statement is always preferable since it always invokes an otherwise case with every if condition.
The sizeof() operator is commonly used in C. It determines the size of the expression or the data type specified in the number of char-sized storage units. The sizeof() operator contains a single operand which can be either an expression or a data typecast where the cast is data type enclosed within parenthesis. The data type cannot only be primitive data types such as integer or floating data types, but it can also be pointer data types and compound data types such as unions and structs.
In C, the "main" function is treated the same as every function, it has a return type (and in some cases accepts inputs via parameters). The only difference is that the main function is "called" by the operating system when the user runs the program. Thus the main function is always the first code executed when a program starts. main() function is a user defined, body of the function is defined by the programmer or we can say main() is programmer/user implemented function, whose prototype is predefined in the compiler. Hence we can say that main() in c programming is user defined as well as predefined because it's prototype is predefined. main() is a system (compiler) declared function whose defined by the user, which is invoked automatically by the operating system when program is being executed.
An array is defined as the collection of similar type of data items stored at contiguous memory locations. Arrays are the derived data type in C programming language which can store the primitive type of data such as int, char, double, float, etc. It also has the capability to store the collection of derived data types, such as pointers, structure, etc. The array is the simplest data structure where each data element can be randomly accessed by using its index number.
C create a new node with the data from the user. Check for root node and then create it. Search for the appropriate position to insert the new node. Display and count the sum of
C program using Recursion and finds the first 'capital letter' that exists in a string. We have included 'ctype.h' in order to make use of "int isupper(char); " function that's defined inside
Color at stars position. Start in upper corner. Gives a message to user. For checking that a particular no. Decides whether output is 1 or 0. Normal mux implementation. Decides...
C Programming code gives all details of a Triangle given the lengths of its sides. Enter the lengths of the three sides of the triangle. S is the semiperimeter of the triangle. D is...
First, create a file to sort, write unsorted data to disk and now, sort the file. Sorting disk file. A Quicksort for files. First read in record i and j and then write them back in opposite slots.
