C++ How to load a textfile and adding the content to a class?

Looking at the text file that you are using as an example and trying to populate a set of classes with the information I'd do something like this:

Text File

42 68 Apples
35 1 Oranges
70 25 Bananas

Looking at the text file you have an int followed by space then another int followed by another space finally followed by a varying size of char[]. We can use this information to create your class or struct and this is how I would create the class based off of the content from the file that is being read in or parsed.

Produce.h

#ifndef PRODUCE_H
#define PRODUCE_H

#include 

class Produce {
private:
    unsigned price_;   // Normally would use float but will use unsigned for simplicity
    unsigned quantity_;
    std::string name_; // You could use the int as an id as you were using

public:
    Produce() {} // Default Constructor

    ~Produce() {} // Default Destructor

                  // User Constructor
    Produce(const std::string& name, const unsigned& price, const unsigned& qty )
        : name_(name), price_(price), quantity_( qty ) {}

    // Copy By Const Reference Constructor
    Produce(const Produce& other) {
        name_     = other.name_;
        price_    = other.price_;
        quantity_ = other.quantity_;
    }

    // Assignment Operator
    Produce& operator=(const Produce& other) {
        name_     = other.name_;
        price_    = other.price_;
        quantity_ = other.quantity_;
        return *this;
    }

    // Setters & Getters
    void setOrChangePrice(const unsigned& priceChange) {
        price_ = priceChange;
    }
    unsigned getPrice() const { return price_; }

    void setName(const std::string& name) {
        // Already Has A Name? Return!
        if (!name_.empty())
            return;
    }
    std::string getName() const { return name_; }

    void setOrChangeQuantity(const unsigned& qty) {
        quantity_ = qty
                                                    

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