C++ Program to Find the Area of a Circle

This C++ Program which computes area of circle. The program takes radius of the circle as an input, calculates the area of the circle and outputs it on the screen.

Here is source code of the C++ program which computes area of circle. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /*
  2.  * C++ Program to Compute the Area of Circle
  3.  */
  4. #include <iostream>
  6. int main()
  7. {
  8.     float radius, area;
  10.     std::cout << "Enter the radius of circle : ";
  11.     std::cin >> radius;
  12.     area = 3.14 * radius * radius;
  13.     std::cout << "Area of circle with radius "
  14.               << radius << " is " << area;
  15. }

$ g++ main.cpp
$ ./a.out
Enter the radius of circle : 5
Area of circle with radius 5 is 78.5

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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