C Exercises: Multiply two numbers using bitwise operators
C Programming Mathematics: Exercise-27 with Solution
Write a C program to multiply two numbers using bitwise operators.
Example:
Input: int x = 8
int y = 9
Output: Product of 8 and 9 using bitwise operators is: 72
Sample Solution:
C Code:
#include <stdio.h>
#include <math.h>
int bitwise_multiply(int x, int y)
{
if (x<0 && y<0)
{
x=x*(-1);
y=y*(-1);
}
if (x>0 && y<0)
{
x=x*(-1);
y=y*(-1);
}
int result = 0;
while (y > 0)
{
if ((y & 1) != 0)
result = result + x;
x = x << 1;
y = y >> 1;
}
return result;
}
int main(void)
{
//int x = 12;
//int y = 55 ;
int x = 8;
int y = 9; ;
printf("Product of %d and %d using bitwise operators is: %d",x,y,bitwise_multiply(x, y));
return 0;
}
Sample Output:
Product of 8 and 9 using bitwise operators is: 72
Flowchart:

C Programming Code Editor:
Improve this sample solution and post your code through Disqus.
Previous: Write a C program to check if a given number is Fibonacci number or not.
Next: Write a C program to find angle between given hour and minute hands.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join