workcpp_3_1 fixed

#include <iostream>

class AreaCalculator {
public:
    static double triangleArea(double base, double height) {
        numCalculations++;
        return 0.5 * base * height;
    }

    static double triangleArea(double sideA, double sideB, double sideC) {
        numCalculations++;
        double p = (sideA + sideB + sideC) / 2;
        return sqrt(p * (p - sideA) * (p - sideB) * (p - sideC));
    }

    static double rectangleArea(double length, double width) {
        numCalculations++;
        return length * width;
    }

    static double squareArea(double side) {
        numCalculations++;
        return side * side;
    }

    static double rhombusArea(double diagonal1, double diagonal2) {
        numCalculations++;
        return 0.5 * diagonal1 * diagonal2;
    }

    static int getNumCalculations() {
        return numCalculations;
    }

private:
    static int numCalculations;
};

int AreaCalculator::numCalculations = 0;

int main() {
    double base = 5.0;
    double height = 3.0;
    double area = AreaCalculator::triangleArea(base, height);
    std::cout << "Triangle area: " << area << std::endl;

    double sideA = 3.0;
    double sideB = 4.0;
    double sideC = 5.0;
    area = AreaCalculator::triangleArea(sideA, sideB, sideC);
    std::cout << "Triangle area: " << area << std::endl;

    double length = 5.0;
    double width = 3.0;
    area = AreaCalculator::rectangleArea(length, width);
    std::cout << "Rectangle area: " << area << std::endl;

    double side = 4.0;
    area = AreaCalculator::squareArea(side);
    std::cout << "Square area: " << area << std::endl;

    double diagonal1 = 6.0;
    double diagonal2 = 8.0;
    area = AreaCalculator::rhombusArea(diagonal1, diagonal2);
    std::cout << "Rhombus area: " << area << std::endl;

    int numCalculations = AreaCalculator::getNumCalculations();
    std::cout << "Number of calculations: " << numCalculations << std::endl;

    return 0;
}