More Issues with classes:

Code:

---

#include <iostream>
#include <string>

using namespace std;

class HeartBeats {
   
public:
    explicit HeartBeats(string first, string last, int how_old)
    : firstNam(first), lastNam(last), age(how_old)
    {
   
    }
   
    void firstName(string first)
    {
        first=firstNam;
       
    }
    void lastName(string last)
    {
        last=lastNam;
    }
    void Age(string how_old)
    {
        how_old=age;
    }
    string get_First() const
    {
        return firstNam;
    }
    string getLastName() const
    {
        return lastNam;
    }
    int getAge() const
    {
        return age;
    }
    void CalculateBPM()
    {
        int BPM;
       
        BPM = 220-age;
       
        cout<<"Hello" <<firstNam<<", Your max Heart Rate should not be over"<<BPM<<"BPM"<<endl;
    }
 
private:
    string firstNam;
    string lastNam;
    int age;
   
};

int main(int argc, const char * argv[])

{
    string firstname,lastname;
    int PersonsAge;
   
    cout<<"Enter the persons first name"<<endl;
    getline(cin, firstname);
   
    cout<<"Enter the persons last name"<<endl;
    getline(cin, lastname);
   
    cout<<"Enter the persons age"<<endl;
    cin << PersonsAge;
   
    HeartBeats heartBeats(firstname ,lastname, PersonsAge);
   
    cout<< heartBeats.get_First()<<endl;
    cout<< heartBeats.getLastName()<<endl;
    cout<< heartBeats.getAge()<<endl;
    cout<< heartBeats.CalculateBPM()<<endl;

 
    return 0;
}

---

I the int PersonAge is not being sent to the class. Everything up to that point was fine.

I want to separate everything into .cpp file and .h files once I see it all working in one program. cin is simply giving me an error and the syntax is correct, what the heck?

Code:

---

    void firstName(string first)
    {
        first=firstNam;
       
    }
    void lastName(string last)
    {
        last=lastNam;
    }
    void Age(string how_old)
    {
        how_old=age;
    }

---

You've got these backwards. Variable "first" is the argument passed into the function. You want to store this into firstNam. Oh, and it's spelled "Name", not "Nam". Same for the others.

>>cin << PersonsAge;
Wrong way. You read FROM cin TO a variable, so it should be
cin >> PersonsAge;

>>cout<< heartBeats.CalculateBPM()<<endl;
CalculateBPM returns void (ie nothing). You can't print void. You probably want to return the BPM from this function instead (use return statement and an appropriate return type).

Code:

---

#include <iostream>
#include <string>

using namespace std;

class HeartBeats {
   
public:
    explicit HeartBeats(string first, string last, int how_old)
    : firstNam(first), lastNam(last), age(how_old)
    {
   
    }
   
    void firstName(string first)
    {
        firstNam=first;
       
    }
    void lastName(string last)
    {
        lastNam=last;
    }
    void Age(int how_old)
    {
        age = how_old;
    }
    string get_First() const
    {
        return firstNam;
    }
    string getLastName() const
    {
        return lastNam;
    }
    int getAge() const
    {
        return age;
    }
    int CalculateBPM()
    {
        int BPM;
       
        BPM = 220-age;
       
        return BPM;
    }
 
private:
    string firstNam;
    string lastNam;
    int age;
   
};

int main(int argc, const char * argv[])

{
    string firstname,lastname;
    int PersonsAge;
   
    cout<<"Enter the persons first name"<<endl;
    getline(cin, firstname);
   
    cout<<"Enter the persons last name"<<endl;
    getline(cin, lastname);
   
    cout<<"Enter the persons age"<<endl;
    cin >> PersonsAge;
   
    HeartBeats heartBeats(firstname ,lastname, PersonsAge);
   
    cout<< heartBeats.get_First()<<endl;
    cout<< heartBeats.getLastName()<<endl;
    cout<< heartBeats.getAge()<<endl;
    cout<< heartBeats.CalculateBPM()<<endl;
    cout<<"Hello " <<heartBeats.get_First()<<", Your max Heart Rate should not be over "<<heartBeats.CalculateBPM()<<" BPM"<<endl;
   
    return 0;
}

---

I got it working thanks again. I think I got a basic understanding now and think I am ready to move to the next chapter. I'll working on these too. Seems like a lot of work though for something so basic. I am sure I will find good use for it in time.

The cin mistake can show you how new I really am. I knew I misspelled lastNam and firstNam, can't give you a good reason why, just did it.

It might be fun to make this class give the Target Heart Rate, the BPM that is good for exercise.