Trouble creating a dat file to declare variable values

[fazedxp]

Im writing a program that calculates cost of making cylinders. The variables used are inputted which work when ran, but 2 variables i am required to use a dat file to input 2 variable values. I am confused on how i create the file and what the dat file will look like just so that i can input that file to declare variables in my program.


#include <iostream> // cout and cin definitions
#include <iomanip> // set precision, showpoint, and fixed definitions
#include <fstream>
using namespace std;

double radius_of_base; // Radius of the base of the cylinder
double height; // Height of the cylinder
double cost; // Cost per square centimeter of material
int quantity; // How many containers
double SA; // Surface Area
double costContainer; // Cost to make one container
double costALL; // Cost to make stated quantity of containers
const float pi = 3.14; // The constant Pi
ifstream infile; // Load file INLABIV.DAT

void Documentation(); // Stating our functions
void User_Input();
void File_Input();
void Calculations();
void Output();

int main() // Main which includes the functions
{
Documentation();
User_Input();
File_Input();
Calculations();
Output();
return 0;
}
// Pre-Conditions: None
// Post-Conditions: Descirption of program outputted

void Documentation() // Outputs description of program
{
cout << "A manufacturer wants to determine the cost of producing an open top\ncylindcrical container. ";
cout << "The surface area is equal to the sum of the area of the base plus the area ";
cout << "of the outside of the cylindrical container which is the\ncircumfrence of the base times the height. " << endl;
}

//Pre Conditions: Program description outputted
//Post Conditions: Height and radius outputted

void User_Input()
{
cout << "Enter the radius of the base: " << endl;
cin >> radius_of_base;
cout << "Enter the height: " << endl;
cin >> height;
}
//Pre Conditions: Radius and height inputted
//Post Conditions: Cost and quantity values inputted

void File_Input()
{
infile.open("INLABIV.DAT");

infile >> cost >> quantity;
}
//Pre Conditions: Cost and quantity values inputted
//Post Conditions: Cost per cyliner, total cost, and surface area calculated

void Calculations() // Function which states our equations and the variables to complete them
{
SA = 2 * pi * radius_of_base * height + 2 * pi * radius_of_base * radius_of_base;
costContainer = SA * cost;
costALL = costContainer * quantity;
}
//Pre Conditions: Surface area, cost per container, and total cost are calculated.
//Post Conditions: Height, radius, cost per cm, quantity, and cost per cylinder are outputted

void Output() // Function which outputs the stated variables as well as cost per container and cost for all containers
{
cout << fixed; // When using 'fixed' outputs a fixed decimal point
cout << fixed << setprecision(4) << "The radius is equal to " << radius_of_base << endl; // States value of radius
cout << fixed << setprecision(4) << "The height is equal to " << height << endl; // States value of height
cout << "The number of cylinders being manufactured is " << quantity << endl; // States quantity of cylinders being produced
cout << fixed << setprecision(2) << "The cost per square centimeter of material is $" << cost << endl; // States the ost per square centimeter of material
cout << "The cost to make one cylinder at $" << fixed << setprecision(2) << cost << " per square centimeter is $" << fixed << setprecision(2) << costContainer << " each." << endl;
cout << "The total cost to manufacture " << quantity << " containers is $" << fixed << setprecision(2) << costALL << endl; // Outputs cost to make all the cylinders
}

[SamuelAdams]

If your making the dat file you can put the 2 values on the same line or on different lines.

If not then you need to know the format so you can pick out the values.

[fazedxp]

so to create the file do i just add new item and save as .dat and then it would just be

1.45
30

if those were the values i needed to put in?
because right now the program runs the values are just 0 when i run it