Introduction
C++ Program to Calculate Area of Circle. I have used Dev-C++ IDE for debugging purpose. But you can use any C programming language compiler as per your compiler availability.
#include<iostream> #define PI 3.141 using namespace std; int main() { float radius, area; cout << "Enter Radius: "; cin >> radius; area = PI * radius * radius; cout << area; return 0; }
Result
![Cplusplus-Program-to-Calculate-Area-of-Circle](https://techstudys.com/wp-content/uploads/2021/07/12-4.png)