Question

7.26 LAB: Nutritional information (classes/constructors) Given main(), complete the Food Item class (in files Foodltem.h and Fooditem.cpp) with constructors to initialize each food item. The default constructor should initialize the name to "None" and all other fields to 0.0. The second constructor should have four parameters (food name, grams of fat, grams of carbohydrates, and grams of protein) and should assign each private field with the appropriate parameter value. Ex: If the input is: M&M's 10.0 34.0 2.0 1.0 where M&M's is the food name, 10.0 is the grams of fat, 34.0 is the grams of carbohydrates, 2.0 is the grams of protein, and 1.0 is the number of servings, the output is: Nutritional information per serving of None: Fat: 0.00 g Carbohydrates: 0.00 g Protein: 0.00 g Number of calories for 1.00 serving(s): 0.00

$double numServings; cin >> numServings; FoodItem1. PrintInfo(); printf(Number of calories for %.2f serving(s): %.2f\n, nums$

In C++ please.

Answer 1

Step1:

FoodItem.h file :

Everything about Code is Explained in Comments of Code:

#ifndef FOODITEM
#define FOODITEM
#include <string>
using namespace std;
class FoodItem
{
    //private data members
private:
    string name;
    double fat;
    double carbs;
    double protein;

//public data members
public:
    FoodItem();
    FoodItem(string name, double fat, double carbs, double protein);
    string getName();
    double GetFat();
    double GetCarbs();
    double GetProtein();
    double GetCalories(double numServings);
    void PrintInfo();
};
#endif

Step2:

FoodItem.cpp: Everything About Code is Explained in Comments of Code:

#include "FoodItem.h"
#include <stdio.h>
//default constructor 
FoodItem::FoodItem()
{
    name = "None";
    fat = 0.0;
    carbs = 0.0;
    protein = 0.0;
}
//parametrize Constructor 
FoodItem::FoodItem(string name, double fat, double carbs, double protein)
{
    this->name = name;
    this->fat = fat;
    this->carbs = carbs;
    this->protein = protein;
}
string FoodItem::getName()
{
    return name;
}
double FoodItem::GetFat()
{
    return fat;
}
double FoodItem::GetCarbs()
{
    return carbs;
}
double FoodItem::GetProtein()
{
    return protein;
}
double FoodItem::GetCalories(double numServings)
{
    double calories = ((fat * 9) + (carbs * 4) + (protein * 4)) * numServings;
    return calories;
}
void FoodItem::PrintInfo()
{
    printf("Nutritional information per serving of %s:\n", name);
    printf("  Fat: %0.2lf g", fat);
    printf("  Carbohydrates: %0.2lf g", carbs);
    printf("  Protein: %0.2lf g", protein);
}

Step3:

main.cpp: Everything About Code is Explained in Comments of code:

#include "FoodItem.h"
#include <stdio.h>
#include <iostream>
using namespace std;
int main(int args, char *argv[])
{
    //object 1 of Class FoodItem
    FoodItem FoodItem1;
    string ItemName;
    double amountFat, amountCarbs, amountProtein;
    //input
    cin >> ItemName;
    cin >> amountFat;
    cin >> amountCarbs;
    cin >> amountProtein;
    //object 1 of Class FoodItem
    FoodItem FoodItem2 = FoodItem(ItemName, amountFat, amountCarbs, amountProtein);
    double numServings;
    cin >> numServings;
    //This function will print all information
    FoodItem1.PrintInfo();
    printf("Number of Calories for %0.2lf serving(s): %0.2lf", numServings, FoodItem1.GetCalories(numServings));
    cout << "\n\n";
    FoodItem2.PrintInfo();
    printf("Number of Calories for %0.2lf serving(s): %0.2lf", numServings, FoodItem2.GetCalories(numServings));
    cout << endl;
    return 0;
}

Output:

TERMINAL PS C:\VSCODE> cd "c:\VSCODE\" ; if ($?) { g++ main.cpp -o main }; if ($?) { . \main} M&M's 10.0 34.0 2.0 1.0 Nutritional information per serving of None: Fat: 0.00 g Carbohydrates: 0.00 g Protein: 0.00 g Number of Calories for 1.00 serving(s): 0.00 Nutritional information per serving of M&M's: Fat: 10.00 g Carbohydrates: 34.00 g Protein: 2.00 g Number of Calories for 1.00 serving(s): 234.00 PS C:\VSCODE> |

Thanks