main.cpp

// Description : calculates the maximum detection range of a radar using the basic radar range equation.
// Author : hexpad

#include <iostream>
#include <cmath>

class Radar {
private:
    double wLength;       // meters
    double P;            // Watts
    double G;             // linear
    double minPw;   // Watts

public:
    Radar(double wl, double pwr, double g, double minP)
        : wLength(wl), P(pwr), G(g), minPw(minP) {}

    // Maximum detection range (simple radar equation)
    double computeMaxRange(double targetRCS) {
        return std::pow((P * pow(G,2) * pow(wLength,2) * targetRCS) /
                            (pow(4 * M_PI,3) * minPw), 0.25);
    }
};

int main() {
    double wLength, P, G, minPw, rcs;

    std::cout << "Radar wavelength (m): ";
    std::cin >> wLength;
    std::cout << "Radar transmit power (W): ";
    std::cin >> P;
    std::cout << "Antenna gain (linear): ";
    std::cin >> G;
    std::cout << "Minimum detection power (W): ";
    std::cin >> minPw;

    std::cout << "Target RCS (m^2): ";
    std::cin >> rcs;

    Radar radar(wLength, P, G, minPw);
    double maxRange = radar.computeMaxRange(rcs);

    std::cout << "\nMaximum Detection Range: " << maxRange << " meters\n";

    if (maxRange > 0)
        std::cout << "Target is detectable within this range.\n";
    else
        std::cout << "Target not detectable.\n";

    return 0;
}