C++ programming computer science code exercise question: Use this given code and

Question

C++ programming computer science code exercise question:

Use this given code and transform it to add new 3 functions:
//void displayStart();
//float calculateFatCalPercent(int g, int c);
//void displayResults(string n, int gr, int ca, float fac);
/* Your int main function will look like this:

int main ()
{
    string foodItem;
    int gramsOfFat;
    int calories;
    float fatCalPercent;
    displayStart();
    cout << "Enter the name of a food item."
    << " Press return." << endl;
    getline(cin, foodItem);
    cout << "Enter the grams of fat; press return." << endl;
    cin >> gramsOfFat;
    cout << "Enter the number of calories; press return."
    << endl;
    cin >> calories;
    fatCalPercent = calculateFatCalPercent(gramsOfFat, calories);
    displayResults(foodItem, gramsOfFat, calories, fatCalPercent);

return 0;
}

This functions will perform the rest of the operations to get it to work.
See sample output at the bottom of this code
*/

//Original program (start here)

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
int main ()
{
string foodItem;
int gramsOfFat;
int calories;
float fatCalPercent;
cout << "Enter the name of a food item."
<< " Press return." << endl;
getline(cin, foodItem);
cout << "Enter the grams of fat; press return." << endl;
cin >> gramsOfFat;
cout << "Enter the number of calories; press return."
<< endl;
cin >> calories;
fatCalPercent = gramsOfFat * 9;
fatCalPercent = fatCalPercent / calories;
fatCalPercent = fatCalPercent * 100;


//Printer headings
cout << setw(4) << "Item" << setw(5) << "Grams of Fat" << setw(5) << "Calories" << setw(5) << "Percent from Fat" << endl;
//Print table values:
cout << "--------------------------------------------------------------------"<< endl;
cout << setw(4) << foodItem << setw(5) << gramsOfFat << setw(5) << calories << setw(15)
     << fatCalPercent << endl;

return 0;
}
/******* Use the following data to find logic errors - and correct
  Chicken          1    6      150
Tuna 2    170    10.5882
Corned Beef   7   200     31.5
   V8           0    35     0
**********************************************************************/

Explanation / Answer

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

void displayStart()
{
   cout<<"Calculate Fat Calorise Percentage "<<endl;
}
float calculateFatCalPercent(int gramsOfFat, int calories)
{
   float fatCalPercent;
   fatCalPercent = gramsOfFat * 9;
   fatCalPercent = fatCalPercent / (calories*(1.0));
   fatCalPercent = fatCalPercent * 100;
   return fatCalPercent;
}
void displayResults(string foodItem, int gramsOfFat, int calories, float fatCalPercent)
{
   cout << setw(4) << "Item" << setw(5) << "Grams of Fat" << setw(5) << "Calories" << setw(5) << "Percent from Fat" << endl;
   //Print table values:
   cout << "--------------------------------------------------------------------"<< endl;
   cout << setw(4) << foodItem << setw(5) << gramsOfFat << setw(5) << calories << setw(15)<< fatCalPercent << endl;
}
int main ()
{
    string foodItem;
    int gramsOfFat;
    int calories;
    float fatCalPercent;
    displayStart();
    cout << "Enter the name of a food item."
    << " Press return." << endl;
    getline(cin, foodItem);
    cout << "Enter the grams of fat; press return." << endl;
    cin >> gramsOfFat;
    cout << "Enter the number of calories; press return."
    << endl;
    cin >> calories;
    fatCalPercent = calculateFatCalPercent(gramsOfFat, calories);
    displayResults(foodItem, gramsOfFat, calories, fatCalPercent);

return 0;
}

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