Question

In C++

Write a program that will calculate the cost of a phone call as follows:

1. The first 10 minutes are charged at a flat rate of $0.99 for the entire 10 minutes (Not 99 cents a minute - but 99 cents for the first 10 minutes total).
2. Every minute after the initial 10 minutes will be charged at $0.10 per minute.
3. Input the number of minutes talked as an integer.
4. Using an IF/ELSE structure, check for an entry of 0 minutes first, and inform the User that no minutes were entered.
   • IF 0 minutes are entered THEN
     • output an error message stating that no minutes were entered.
   • ELSE
     • Calculate and display the results.
     • The final display will show the minutes and the final cost.
     • The price will be formatted with 2 decimal places.
   • END IF
5. Add the code necessary to allow the display window to stay open until you press a key from the keyboard:

system ("pause");

Include all Prologue information with your program

• Include an Initial Algorithm
• Include a Refined Algorithm
• Include Input, Output, and Formulas (if there are any)
• Test your program thoroughly with the following data:

1. 9 minutes
2. 10 minutes
3. 11 minutes
4. 35 minutes

NOTE 1:

• DO NOT use the "return 0" code, end, break, or exit to force an exit from within your IF/ELSE structure.
  • Let the program progress to the end of the main function.
  • The end of the main function is the only place that the “return 0” should be placed.
  • A switch statement is the only place that the break command should be placed.
• Declare all variables within the data declaration section.
• DO NOT get input on the same line as a variable declaration.
• DO NOT place an equation for computation on the same line as declaring a variable.

NOTE 2:
1. Declare all variables within the data declaration section of each class and method.  (-.1)
2   Do not get input on the same line as a variable declaration.  (-.1)
3. Do not place an equation for computation on the same line as declaring a variable.  (-.1)

Answer 1

A) Initial Algorithm:

• Get the user input for the number of minutes used.
• If the user input is 0, print an error message saying that no minutes were entered.
• Else,
  • If the minutes used is less than 10 minutes, then the final cost is $.99.
  • Else, find the final cost using the formula: 0.99 + (numberOfMinutes - 10)*0.1
• Print the final cost.

c) INPUT: Number of minutes used by the user

OUTPUT: The final cost for the number of minutes used in dollars.

CODE

#include <iostream>

using namespace std;

int main() {

double finalCost;

int numberOfMinutes;

cout << "Enter the number of minutes used: ";

cin >> numberOfMinutes;

if (numberOfMinutes == 0) {

cout << "No minutes were entered." << endl;

} else {

if (numberOfMinutes <= 10) {

finalCost = 0.99;

} else {

finalCost = 0.99 + (numberOfMinutes - 10) * 0.1;

}

printf("The final cost is: $%.2f", finalCost);

}

system("pause");

return 0;

}

NOTE: Please explain what should go inside refined algorithm. Since I am not sure of what to include inside it, I have skipped it.