#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

class bloodPressure {
public:
    // Data members:
    int systolic;
    int diastolic;

    // Member functions:
    void print() const;          // Print the blood pressure reading
    void increase(int s, int d); // Increase systolic and diastolic values
    void next();                 // Simulate the next day's reading (basic fluctuation)
    void next(int n);            // Simulate n days of readings
};

int main()
{
    // Output a sample blood pressure reading
    const bloodPressure normal {120, 80};
    normal.print();
    cout << " is a normal reading.\n";

    // Create a reading for today (randomized a bit)
    srand(static_cast<unsigned int>(time(nullptr)));
    bloodPressure today {110 + rand() % 21, 70 + rand() % 16}; // systolic: 110–130, diastolic: 70–85
    today.print();
    cout << " is today's reading.\n";

    // Simulate tomorrow's reading
    bloodPressure tomorrow {today};
    tomorrow.next();
    tomorrow.print();
    cout << " is tomorrow's reading.\n";

    // Simulate reading after a week
    bloodPressure nextWeek {today};
    nextWeek.next(7);
    nextWeek.print();
    cout << " is next week's reading.\n";

    return EXIT_SUCCESS;
}

void bloodPressure::print() const {
    cout << systolic << "/" << diastolic << " mmHg";
}

void bloodPressure::increase(int s, int d) {
    systolic += s;
    diastolic += d;
}

void bloodPressure::next() {
    // Simulate small random fluctuation
    systolic += (rand() % 5) - 2;   // Change between -2 and +2
    diastolic += (rand() % 5) - 2;
}

void bloodPressure::next(int n) {
    for (int i = 0; i < n; ++i) {
        next(); // Advance one day
    }
}