Thread: Help with basic class and object coding.

Code:

#include <iostream>
#include <string>
using namespace std;


class Specs_M{
    
private:
    string height;
    string weight;
public:    
    Specs_M(string y, string z){
        setweight(y);
        setheight(z);
    }
    void setweight(string x){
        weight=x;
    }
    string getweight(){
        return weight;
    }
    void setheight (string x){
         height=x;
    }
    string getheight(){
        return height;
    }
};


class Specs_P {
    private:
        string age;
        string weightp;
        string heightp;
    public:
        Specs_P(string z){
            setage(z);
        }
    void setage(string x){
            age=x;
        }
    string getage(){
        return age;
    }    
    /*Specs_P(string g, string f){
        setweightp(g);
        setheightp(f);
    }*/
    void setweightp(string y){
        weightp=y;
    }    
     string getweightp(){
        return weightp;
        } 
    void setheightp(string v){
        v=heightp;
    }
    string getheightp(){
        return heightp;
    }
};


int main() {
    
    Specs_M object1("136 lbs","70 inches");
    cout<<object1.getweight()<<"\n"<<object1.getheight()<<endl;
    
    Specs_P object2("Age of user: unknown");
    cout<<object2.getage()<<endl;
    
    string g;
    cout<<"Enter your weight in lbs with units."<<endl;
    cin>>g;
    Specs_P object3;
    object3.setweightp(g);
    
    string f;
    cout<<"Enter your height in inches with units."<<endl;
    cin>>f;
    // Specs_P object3(g,f);
    Specs_P object4;
    object4.setheightp(f);
    
    cout<<"Your weight is:"<<object3.getweightp()<<"\n Your height is:"<<object4.getheightp()<<endl;
    
    
    return 0;
}

In the code above, I removed the constructors by commenting them off. Instead, I wanted to set the variables through an object. However, when I run the code, I get an error message pertaining to the Specs_P object3; and Specs_P object4;.

The message is no matching functions for call to Specs_P::Specs_P().

Why is this?

Any help is appreciated. thanks

Specs_P object3; will construct the object with the default constructor, since you don't have it's an error.
Just add Specs_P() = default; to your Specs_P class.
Why do you return copies in your get functions ?
Normal practice is to return a const reference, also in your setter it's better to use a const reference.
Example:

Code:

class Specs_M 
{
private:
  string height;
  string weight;
public:
  Specs_M() = default;
  Specs_M(const string& y, const string& z) 
  {
    setweight(y);
    setheight(z);
  }
  void setweight(const string& x) { weight = x; }
  const string& getweight() const { return weight; }
  void setheight(const string& x) { height = x; }
  const string& getheight() const { return height; }
};

Ok, thank you. I haven't learned that stuff yet. Everything I've learned is from a youtube tutorial, so some of the stuff may be against common practice.

Personally I don't recommend to use YouTube. Too much old crap from people who are not experts.

Better to use a good book.
The C++ Programming Language Bjarne Stroustrup
The C++ Programming Language: Amazon.co.uk: Bjarne Stroustrup: 0000321563840: Books