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#include <iostream>
#include <iomanip>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <fstream>
using namespace std;
// function prototype
void showMenu();
void showWeight(double, int);
void showTime (int, double, int);
//Constants for menu choices
const int Mercury = 1,
Venus = 2,
Earth = 3,
Mars = 4,
Jupiter = 5,
Saturn = 6,
Uranus = 7,
Neptune = 8,
Quit = 9;
//Constants for weight
const double gravityMercury = 0.27,
gravityVenus = .086,
gravityEarth = 1.00,
gravityMars = 0.37,
gravityJupiter = 2.64,
gravitySaturn = 1.17,
gravityUranus = .092,
gravityNeptune = 1.44;
//Constants for distance
const int distanceMercury = 93 - 36,
distanceVenus = 93 - 67,
distanceEarth = 93 - 93,
distanceMars = 141 - 93,
distanceJupiter = 483 - 93,
distanceSaturn = 886 - 93,
distanceUranus = 1782 - 93,
distanceNeptune = 2793 - 93;
int main ()
{
ofstream outputFile;
outputFile.open("demofile.txt");
int choice; // to hold menu choice
int currentWeight; // to hold user weight
double speed; // to hold user speed
float time; // to hold user time
char restart = 'Y'; // to restart program
cout << fixed << showpoint << setprecision(2);
while (restart == 'y' || restart == 'Y')
{
system ("cls");
//display the menu and get the user's choice
showMenu();
cin >> choice;
//validate menu selection
while ( choice < 1 || choice > 9)
{
cout << "Please enter a valid menu choice between 1 and 9: ";
cin >> choice;
}
if (choice != Quit)
{
// get weight
cout << "How much do you weight in lbs?\n";
cin >> currentWeight;
// get speed
cout << "How fast would you like to travel (mph)?\n";
cin >> speed;
// display new weights
switch (choice)
{
case Mercury:
showWeight (gravityMercury, currentWeight);
showTime (distanceMercury, speed, time);
break;
case Venus:
showWeight (gravityVenus, currentWeight);
showTime (distanceVenus, speed, time);
break;
case Earth:
showWeight (gravityEarth, currentWeight);
showTime (distanceEarth, speed, time);
break;
case Mars:
showWeight (gravityMars, currentWeight);
showTime (distanceMars, speed, time);
break;
case Jupiter:
showWeight (gravityJupiter, currentWeight);
showTime (distanceJupiter, speed, time);
break;
case Saturn:
showWeight (gravitySaturn, currentWeight);
showTime (distanceSaturn, speed, time);
break;
case Uranus:
showWeight (gravityUranus, currentWeight);
showTime (distanceUranus, speed, time);
break;
case Neptune:
showWeight (gravityNeptune, currentWeight);
showTime (distanceNeptune, speed, time);
break;
default:
cout << "Invalid Entry. Please enter a number between 1 and 8.\n\n";
}
}
cout << "Go again? (y/n)" << endl;
cin >> restart; // change control variable
}
// end while loop
system ("cls");
cout << "The End";
return 0;
}
void showMenu()
{
cout << "To which planet will you be traveling? \n" << endl;
cout << "1. Mercury \n";
cout << "2. Venus \n";
cout << "3. Earth \n";
cout << "4. Mars \n";
cout << "5. Jupiter \n";
cout << "6. Saturn \n";
cout << "7. Uranus \n";
cout << "8. Neptune \n";
cout << "9. Quit Program\n" << endl;
cout << "Please enter a choice between 1 and 9. \n";
}
void showWeight (double planet, int currentWeight)
{
ofstream outputFile;
outputFile.open("demofile.txt");
outputFile << "Your total weight is "
<< (planet * currentWeight) << endl;
outputFile.close();
}
void showTime (int distance, double speed, int time)
{
ofstream outputFile;
outputFile.open("demofile.txt");
outputFile << "Your total time is "
<< (distance / speed) << endl;
outputFile.close();
}
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