aryan810-old.github.io/cia.cpp at master · Aryan810/aryan810-old.github.io · GitHub

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#include <iostream>
#include <cmath>

// Circle's Intersection Area >>

using namespace std;

double getCircleIntersectionArea(double radiusSmall, double radiusBig, double distanceBtwCenters){
    double& r = radiusSmall;
    double& R = radiusBig;
    if (radiusSmall > radiusBig){
        r = radiusBig;
        R = radiusSmall;
    }
    double& s = distanceBtwCenters;
    double p = (180*r*R);
        if (s <= (r+R)){
            if (s > R){
                return ((r*r*((s*s*asin(R/s)*180) - p)) + (R*R*((s*s*asin(r/s)*180) - p)))/(180*s*s);
            }else{
                if (s <= r){
                    return 2*acos(0.0)*r*r;
                }else{

                }
            }
        }else{
            return 0.0;
        }
}

class CircleIntersectionArea{
    float r, R, s;
    double pi = 2*acos(0.0);
    double area;

    double inverseSin(double value){
        return asin(value)*180/pi;
    }

    double getArea(){
        double p = (180*r*R);
        if (s <= (r+R)){
            return ((r*r*((s*s*pi*inverseSin(R/s)) - p)) + (R*R*((s*s*pi*inverseSin(r/s)) - p)))/(180*s*s);
        }else{
            return 0.0;
        }
    }

    public:

        CircleIntersectionArea(){
            r = 1.0;
            R = 1.0;
            s = 1.0;
        };

        CircleIntersectionArea(float radiusSmall, float radiusBig, float distanceBtwCenters){
            r = radiusSmall;
            R = radiusBig;
            s = distanceBtwCenters;
            area = getArea();
        }

        void setParams(float radiusSmall, float radiusBig, float distanceBtwCenters){
            r = radiusSmall;
            R = radiusBig;
            s = distanceBtwCenters;
            area = getArea();
        }

        double getIntersectionArea(){return area;}
};

int main(int argc, char const *argv[]){
    double R, r, s;
    cout << "Enter Big Radius: ";
    cin >> R;
    cout << endl << "Enter Small Radius: ";
    cin >> r;
    cout << endl << "Enter distance btw centers: ";
    cin >> s;
    cout << endl << "Area: " << getCircleIntersectionArea(r, R, s);
    return 0;
}