/* Movie Profit - This is a modification of the Movie Data program written
for Programming Challenge 11.01. This program uses a structure named
MovieData to store the following information about a movie:
* Title
* Director
* Year Released
* Running Time (in minutes)
* Production cost
* First year's profit or loss
The function that displays the movie data is modified so that it displays
the title, director, release year, running time, and first year's profit
or loss. */
#include "Utility.h"
struct MovieData
{
string title; /* The movie's title */
string director; /* The movie director's name */
int releaseYear; /* The year the movie was released */
int runningTime; /* The movie length in minutes */
double productionCost; /* The movie's production cost */
double revenue; /* The movie's first year profit or loss */
};
void getMovieData(MovieData &);
double getProfit(const MovieData &);
void repeatInput(MovieData &, double);
string formatOutput(const double);
void showMovieData(const MovieData &, const double);
int main()
{
/* Structure variable definitions */
MovieData movieOne;
MovieData movieTwo;
double profitM1 = 0.0; /* Holds the profit or loss of movie one */
double profitM2 = 0.0; /* Holds the profit or loss of movie two */
cout << "\n\tFavorite Movie Database\n\n";
getMovieData(movieOne);
profitM1 = getProfit(movieOne);
repeatInput(movieOne, profitM1);
getMovieData(movieTwo);
profitM2 = getProfit(movieTwo);
repeatInput(movieTwo, profitM2);
cout << "\n\tThese movies are now stored in your database:\n";
showMovieData(movieOne, profitM1);
showMovieData(movieTwo, profitM2);
pauseSystem();
return 0;
}
/* **********************************************************
Definition: repeatInput
This function uses a structure reference variable as its
argument. It asks the user to confirm his or her input. If
the displayed information is incorrect, the user is asked
to repeat the input. If the user finds that the input is
correct, a message is displayed, telling the user that the
movie info has been added.
********************************************************** */
void repeatInput(MovieData &movieInfo, double profit)
{
char again = ' '; /* Holds the user's choice */
do
{
showMovieData(movieInfo, profit);
cout << "\tIs the data you entered correct? (Y/N): ";
cin >> again;
cin.ignore();
if (toupper(again) == 'Y')
{
cout << "\n\tThe following movie info has been added:\n";
showMovieData(movieInfo, profit);
}
else
{
cout << "\n\n\tPlease repeat your input:\n";
getMovieData(movieInfo);
profit = getProfit(movieInfo);
}
} while (toupper(again) == 'N' || toupper(again) != 'Y');
}
/* **********************************************************
Definition: getMovieData
This function uses a structure reference variable as its
argument. It asks the user for data about his or her two
favorite movies. This data is stored in the structure.
********************************************************** */
void getMovieData(MovieData &movieInfo)
{
cout << "\n\tEnter the name of your favorite movie: ";
getline(cin, movieInfo.title);
cout << "\tEnter the name of the movie's director: ";
getline(cin, movieInfo.director);
cout << "\tEnter the year the movie was released: ";
cin >> movieInfo.releaseYear;
cout << "\tEnter the running time (in minutes): ";
cin >> movieInfo.runningTime;
cout << "\tEnter the movie's production cost: $";
cin >> movieInfo.productionCost;
cout << "\tEnter the movie's first-year revenue: $";
cin >> movieInfo.revenue;
cin.ignore();
}
/* **********************************************************
Definition: getProfit
This function accepts a constant reference to a structure
variable as argument. It calculates the profit or loss of
the movies. The result of this calculation is returned.
********************************************************** */
double getProfit(const MovieData &movieInfo)
{
double total = 0.0; /* Holds the total profit or loss */
return total = movieInfo.revenue - movieInfo.productionCost;
}
/* **********************************************************
Definition: showMovieData
This function accepts a constant reference to a structure
variable as argument. It displays the movie data.
********************************************************** */
void showMovieData(const MovieData &mData, const double profit)
{
string revenue; /* Holds the formatted profit */
cout << "\n\tMovie Title: " << mData.title << "\n"
<< "\tDirector: " << mData.director << "\n"
<< "\tRelease Year: " << mData.releaseYear << "\n"
<< "\tRunning Time: " << mData.runningTime << " minutes\n";
revenue = formatOutput(profit);
profit > 0 ? cout << "\n\tFirst-Year Profit: $" << revenue << "\n\n" :
cout << "\n\tFirst-Year Loss: $" << revenue << "\n\n";
}
/* **********************************************************
Definition: showMovieData
This function formats the profit to make it more legible.
To achieve this, commata are inserted in the string object
holding the profit. Amounts between one-thousand, up to
nine-billion, are considered. Example:
* 1985456 becomes 1,985,456
* -92482948 becomes 92,482,948
If the string object contains a negative amount, the minus
sign is erased, before formatting takes place. The string
object is returned.
********************************************************** */
string formatOutput(const double profit)
{
string revenue = to_string((int)profit);
if (revenue.at(0) == '-')
{
revenue.erase(0,1);
}
/* This chained ternary operator determines the length of the
string object's contents. Based on the result, commata are
inserted at the appropriate substring position(s). */
revenue.length() == 4 ? revenue.insert(1, ",") :
revenue.length() == 5 ? revenue.insert(2, ",") :
revenue.length() == 6 ? revenue.insert(3, ",") :
revenue.length() == 7 ? revenue.insert(1, ","), revenue.insert(5, ",") :
revenue.length() == 8 ? revenue.insert(2, ","), revenue.insert(6, ",") :
revenue.length() == 9 ? revenue.insert(3, ","), revenue.insert(7, ",") :
revenue.length() == 10 ? revenue.insert(1, ","), revenue.insert(5, ","),
revenue.insert(9, ",") : revenue;
return revenue;
}
Example Output:
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