C++ heartbeat-code

#include <iostream>

using namespace std;

 

bool heartRate (int, double);

int main()

{

    int age;

    double heartbeatsMinute;

    bool targetHeartRate;

 

    cout << "What is your age? ";

    cin >> age;

 

    while (age > 0) // loop while age is not entered negative

    {

        cout << "How many heartbeats did you count in a minute? ";

        cin >> heartbeatsMinute;

 

        targetHeartRate = heartRate(age, heartbeatsMinute);
 

        if (targetHeartRate == true) // if heart rate is true

        {

            cout << "You are within your target heart range.\n";

            cout << "Enter another age. ";

            cin >> age;

        }

        else

        {

            cout <<"You are not within your target heart range.\n";

            cout <<"Enter another age. ";

            cin >> age;

        }
    }
    return 0;

}

// heartRate function

bool heartRate(int age, double heartbeatsMinute)

{
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44
    const double targetPercent = .65; // percent between 60 & 70
45
    const int num = 220;
46
 
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    double targetRate;

    targetRate = ((num - age)*targetPercent); // formula to find target rate

 

    if (heartbeatsMinute <= targetRate) // if the heart beats entered are less or equal to target rate

    {

        return true;

    }

    else

    {

        return false;
    }

}