All star patterns using C++ programming Language

C++ Program to Calculate Area of Circle


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.

#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;



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