 # C Programming Code Examples

## C > Mathematics Code Examples

### Program to Multiply given Number by 4 using Bitwise Operators

``` Program to Multiply given Number by 4 using Bitwise Operators This C Program multiplies given number by 4 using bitwise operators. The bitwise operators are or, and, xor, not, left shift, right shift. Program uses left shift operator for this. #include <stdio.h> void main() { long number, tempnum; printf("Enter an integer \n"); scanf("%ld", &number); tempnum = number; /* left shift by two bits */ number = number << 2; printf("%ld x 4 = %ld\n", tempnum, number); } ```

C Programming Writing a Character to file - In C to write the file, we must open the file in a mode that supports writing. For example, if you open a file in "r" mode, you won't be able to write the file as "r" is read only mode that

Program Implement the Vizing's Theorem - The chromatic index of the simple graph can be either 'maxDegree' or maxDegree+1. The chromatic index is the maximum number of color needed for the 'edge coloring' of graph.

Find the Frequency of Substring in Strings - Take a string and a substring as input. Store it in the arrays 'str[] & str1[]' respectively. Using For Loop to 'compare' str1[] with the str[]. Do step2 until the end of main string. During the

C++ Compute Combinations by Factorials - Prints a total number of combination possible for given n and r value. The "time complexity" of this algorithm is O(n). This algorithm takes the input of n and r value. Function to find the

Multiple Initialization Inside For Loop in C - 1. It is initializing two variables. Note: both are separated by comma (,). 2. It has two test conditions joined together using AND (&&) logical operator. You cannot use multiple test

C Programming coding Calendar example - This is because a leap year does not strictly fall on every fourth year. If a year is divisible by 4, then it is a leap year, but if that year is divisible by 100, then it is not a leap year.

C++ Language Encapsulation is a Process - Here we have two "data members" num and ch, we have declared them as private so that they are not accessible outside the class, this way we are hiding the data. The only way to

C Programs Calculates the Simple Interest - Program calculates the simple interest given the principal amount, rate of interest & time. The Formula to calculate the Simple interest is: simple_interest = (p * t * r) / 100 where p...