Question

Take the code below, add the parameter validation as prompted by the highlighted comments.

#include <iostream>
using namespace std;

// Prototype (Wait, what's this? Hmmm... how would you find out? )
void calculateBill(double, int);

int main()
{
// local variables
int numMonths = 10;
double rate = 25.99;

// Perform a test for $25.99 membership.
cout << "Calling the calculateBill function with arguments "
??? << rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << calculateBill << "\n";

// Perform a test for 70.50 membership.
numMonths = 5;
rate = 70.50;
cout << "Calling the calculateBill function with arguments "
??? << rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << calculateBill << "\n";

// Perform a test for $-5 membership.
numMonths = 5;
rate = -5;
cout << "Calling the calculateBill function with arguments "
??? << rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << calculateBill << "\n";

//// What should you add to your function now?

// Perform a test for -10 months. Keep -5 to make sure you added that input validation
numMonths = -10;
rate = -5;
cout << "Calling the calculateBill function with arguments "
??? << rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << calculateBill << "\n";

//// What should you add to your function now?

return 0;
}

//*****************************************************************
// Definition of function calculateBilll. The memberRate parameter holds *
// the monthly membership rate and the months parameter holds the *
// number of months. The function displays the total charges. *
//*****************************************************************
double calculateBill(double memberRate, int months)
{
return (memberRate * months);
}

Answer 1

note: if you have any queries then comment below. thank you

#include <iostream>
using namespace std;

// Prototype (Wait, what's this? Hmmm... how would you find out? )
double calculateBill(double, int);

int main()
{
// local variables
int numMonths = 10;
double rate = 25.99;
double total=0;

// Perform a test for $25.99 membership.
cout << "Calling the calculateBill function with arguments "<< rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << total << "\n";

// Perform a test for 70.50 membership.
numMonths = 5;
rate = 70.50;
cout << "Calling the calculateBill function with arguments "<< rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << total << "\n";

// Perform a test for $-5 membership.
numMonths = 5;
rate = -5;
cout << "Calling the calculateBill function with arguments "<< rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << total << "\n";

//// What should you add to your function now?

// Perform a test for -10 months. Keep -5 to make sure you added that input validation
numMonths = -10;
rate = -5;
cout << "Calling the calculateBill function with arguments "<< rate << " and " << numMonths << "\n";
total = calculateBill(rate, numMonths);
cout << "Bill is " << total << "\n";

//// What should you add to your function now?

return 0;
}

//*****************************************************************
// Definition of function calculateBilll. The memberRate parameter holds *
// the monthly membership rate and the months parameter holds the *
// number of months. The function displays the total charges. *
//*****************************************************************
double calculateBill(double memberRate, int months)
{
if(memberRate<0 || months<0)
return 0;
else
return (memberRate * months);
}