I know I need to avoid global variables as much as possible but somehow I need to use certain variables in other functions. This program is a recipe program. Adds, deletes and views recipes. Everything is working. Maybe not the best code but it works. The second part of the task is to make it so that: THE USER INPUTS THE AMOUNT OF PEOPLE HE NEEDS TO SERVE WITH THE RECIPE. THE PROGRAM MUST CHANGE THE RECIPE QUANTITIES TO SUIT HIS NEEDS.
My plan was to make a variable called "multiplier" which is multiplied by each quantity however I don't know whether there is a better way. Unfortunately since the variables I need are in "addRecipe" I cannot possibly access them. I require "int people" and "int quan[]" so I can divide the Number of servings he wants by the number of people the recipe is for. This will give me a multiplier which I then use to multiply each NUMERICAL value within the array. The array is then outputted differently without changing the recipe. This may not be the best plan and I have attempted it several times using parameters but I cannot seem to make it work. The code is below as is my attempts.
// Recipe.cpp : Defines the entry point for the console application.
//
int _tmain(int argc, _TCHAR* argv[])
{
return 0;
}
// Practice.cpp : Defines the entry point for the console application.
//
// 2a
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
using namespace std;
void deleteRecipe(){
DIR *dp;
struct dirent *ep;
dp = opendir ("C:\\Users\\The\\Documents\\Visual Studio 2010\\Projects\\Recipe\\Recipe");
if (dp != NULL)
{
while (ep = readdir (dp))
puts (ep->d_name);
(void) closedir (dp);
}
else
perror ("Couldn't open the directory");
cout<< "Please input the file you would like to delete from the list above: "<<endl;
string dName;
cin>>dName;
remove(dName.c_str());
cout<<"The recipe has BEEN DELETED! " <<endl;
system("pause");
}
int addRecipe(){
//PART B OF PROBLEM!
int count = 1;
string title;
string item;
int quan [100];
string units;
int people;
cout<<"What is the title of your new recipe?"<<endl;
cin.ignore();
getline(cin, title);
ofstream outFile(title+".txt", ios::out);
cout<< "How many people will this recipe serve?"<<endl;
cin>>people;
cout<< title << " - Servings: " << people << " people" <<endl;
cout<<" Please type your ingredients in the format as follows. Be to sure to input a '#'upon completion."<<endl;
while (count<1000){
cout<< "Enter Item: "<<endl;
cin.ignore();
getline(cin, item,'#');
cout<< "Enter Quantity: "<<endl;
cin>>quan[];
cout<< ("Enter units")<<endl;
getline(cin, units);
count = count++;
}
cout<< "Thank you for inputting your recipe. To view your recipe, please do nothing."<<endl;
outFile << title <<endl;
outFile<< people << " People" <<endl;
outFile<< item<<endl;
return 0;
}
int viewRecipe(){
DIR *dp;
struct dirent *ep;
dp = opendir ("C:\\Users\\The\\Documents\\Visual Studio 2010\\Projects\\Recipe\\Recipe");
if (dp != NULL)
{
while (ep = readdir (dp))
puts (ep->d_name);
(void) closedir (dp);
}
else
perror ("Couldn't open the directory");
cout<<"Please type in the name file you want to view from the list above: "<<endl;
string fileName;
string line;
cin>> fileName;
ifstream inData;
inData.open(fileName.c_str());
if (inData.is_open())
{
while ( getline (inData,line) )
{
cout << line << '\n';
}
inData.close();
int multiplier = 0;
char choice;
int newAmount;
cout<<"That was the original. If you would like to view the same recipe with a different amount of servings please press '#'."<<endl;
// PART A OF PROBLEM!
if (choice= '#'){
cout<<"How many servings would you like to adapt the recipe to?"<<endl;
cin>>newAmount;
multiplier = newAmount/ addRecipe(0, );
}
}
return 0;
}
int menu(){
int input = 0;
cout<< "1: View Recipe" <<endl;
cout<< "2: Add Recipe" <<endl;
cout<< "3: Delete Recipe" <<endl;
cout<< "Please select an option"<<endl;
cin>>input;
if (input == 1){
viewRecipe();}
if (input == 2){
addRecipe();}
if (input == 3){
deleteRecipe();}
return 0;
}
int main(){
menu();
system("pause");
cin.get();
return 0;
}
My attempt which does not work:
int addRecipe(int people, int quan[]){
int count = 1;
string title;
string item;
int quan [100];
string units;
int people;
cout<<"What is the title of your new recipe?"<<endl;
cin.ignore();
getline(cin, title);
ofstream outFile(title+".txt", ios::out);
cout<< "How many people will this recipe serve?"<<endl;
cin>>people;
cout<< title << " - Servings: " << people << " people" <<endl;
cout<<" Please type your ingredients in the format as follows. Be to sure to input a '#'upon completion."<<endl;
while (count<1000){
cout<< "Enter Item: "<<endl;
cin.ignore();
getline(cin, item,'#');
cout<< "Enter Quantity: "<<endl;
cin>>quan[];
cout<< ("Enter units")<<endl;
getline(cin, units);
count = count++;
}
cout<< "Thank you for inputting your recipe. To view your recipe, please do nothing."<<endl;
outFile << title <<endl;
outFile<< people << " People" <<endl;
outFile<< item<<endl;
return 0;
}
int viewRecipe(int multiplier){
DIR *dp;
struct dirent *ep;
dp = opendir ("C:\\Users\\The\\Documents\\Visual Studio 2010\\Projects\\Recipe\\Recipe");
if (dp != NULL)
{
while (ep = readdir (dp))
puts (ep->d_name);
(void) closedir (dp);
}
else
perror ("Couldn't open the directory");
cout<<"Please type in the name file you want to view from the list above: "<<endl;
string fileName;
string line;
cin>> fileName;
ifstream inData;
inData.open(fileName.c_str());
if (inData.is_open())
{
while ( getline (inData,line) )
{
cout << line << '\n';
}
inData.close();
int multiplier = 0;
char choice;
int newAmount;
int x = addRecipe(people, void)
cout<<"That was the original. If you would like to view the same recipe with a different amount of servings please press '#'."<<endl;
if (choice= '#'){
cout<<"How many servings would you like to adapt the recipe to?"<<endl;
cin>>newAmount;
multiplier = newAmount/ addRecipe(, );
}
Here's an idea for you (because, as you said, you shouldn't use globals unless absolutely necessary, and in your case, it's not necessary):
1.Create a class ingredient:
class ingredient {
public:
string name;
string unit;
double quantity;
ingredient(string n, string u, double q) :
name(n), unit(u), quantity(q) { }
}
2.Create a class recipe:
class recipe {
vector<ingredient> the_recipe;
public:
recipe() : the_recipe() {}
void addIngredient(const ingredient& i) {
the_recipe.push_back(i);
}
void printProportions(const int servings) {
printf("For %d servings, you need", servings);
for(int i = 0; i < the_recipe.size(); ++i) {
printf("%f %s of %s\n", the_recipe[i].quantity * servings, the_recipe[i].unit, the_recipe[i].name);
}
}
};
What do you think?
UPDATE
3.Use it in your program:
Here's an example of how you can use it (also note I've modified my struct above. In order to avoid possible confusion, I changed it to a class. They're both the same essentially in C++, with one minor difference). Anyway, here's an example:
int main() {
// create the ingredient objects
ingredient macaroni("macaroni", "grams", 50), cheese("cheese", "grams", 20);
// create a plain recipe
recipe mac_n_cheese;
// add the ingredients
mac_n_cheese.addIngredient(macaroni);
mac_n_cheese.addIngredient(cheese);
// then finally print the proportions using printProportions
mac_n_cheese.printProportions(2); // for 2 people
return 0;
}