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While Loop with if statements

halamaker (83)
I haven't compiled this yet but I'm wondering if I did this right from what you can tell me and if you see any glaring problems with it. The assignment said to

displayBetterPlans() function that calls calcPlanCharge (plan) for each of the plans, compares the charges and displays each of the plans that would have been a better choice for that month based on the customer usage and, in addition, it displays the charge under that plan and the savings the customer would have received. Use a while or for loop to do this task. Obviously, you will also have to use if statement(s).

This is just the section of code I'm worried about, will it produce an infinite loop??

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double InternetCharge::calcPlanCharge(int plan)
{
	switch (plan)
	{
		case 1:
			if (minutes > 6000)
			{
				if (data > 5)
				{
					charge = 20 + (minutes - 6000)*1.00 + (data - 5)*10;
				}
				else
				{
					charge = 20 + (minutes - 6000)*1.00;
				}
			}
			else
			{
				if (data > 5)
				{
					charge = 20 + (data - 5)*10;
				}
				else
				{
					charge = 20;
				}
			}
			break;
		case 2:
			if (data > 5)
			{
				charge = 50 + (data - 5)*10;
			}
			else
			{
				charge = 50;
			}
			break;
		case 3:
			if (minutes > 9000)
			{
				charge = 80 + (minutes - 9000)*1;
			}
			else
			{
				charge = 80;
			}
			break;
		case 4:
			charge = 120;
			break;
		default:
			cout << "Plan number not valid";
	}
	return charge;
}

//Output Functions
void InternetCharge::displayBetterPlans()
{
	double alt = 0.0;
	double savings = 0.0;

	calcPlanCharge(1);
	calcPlanCharge(2);
	calcPlanCharge(3);
	calcPlanCharge(4);

	cout << "Plans that would have saved the customer money: ";
	while (plan == 1)
	{
		if (charge > calcPlanCharge(2))
		{
			alt = calcPlanCharge(2);
			savings = charge - alt;
			cout << "Plan 2:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(3))
		{
			alt = calcPlanCharge(3);
			savings = charge - alt;
			cout << "Plan 3:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(4))
		{
			alt = calcPlanCharge(4);
			savings = charge - alt;
			cout << "Plan 4:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
	while (plan == 2)
	{
		if (charge > calcPlanCharge(1))
		{
			alt = calcPlanCharge(1);
			savings = charge - alt;
			cout << "Plan 1:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(3))
		{
			alt = calcPlanCharge(3);
			savings = charge - alt;
			cout << "Plan 3:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(4))
		{
			alt = calcPlanCharge(4);
			savings = charge - alt;
			cout << "Plan 4:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
	while (plan == 3)
	{
		if (charge > calcPlanCharge(1))
		{
			alt = calcPlanCharge(1);
			savings = charge - alt;
			cout << "Plan 1:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(2))
		{
			alt = calcPlanCharge(2);
			savings = charge - alt;
			cout << "Plan 2:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(4))
		{
			alt = calcPlanCharge(4);
			savings = charge - alt;
			cout << "Plan 4:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
	while (plan == 4)
	{
		if (charge > calcPlanCharge(1))
		{
			alt = calcPlanCharge(1);
			savings = charge - alt;
			cout << "Plan 1:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(2))
		{
			alt = calcPlanCharge(2);
			savings = charge - alt;
			cout << "Plan 2:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (charge > calcPlanCharge(3))
		{
			alt = calcPlanCharge(3);
			savings = charge - alt;
			cout << "Plan 3:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
}
Last edited on
halamaker (83)
Alrighty I've compiled it, but it just displays

"Plans that would have saved the customer money: "

And nothing else...
halamaker (83)
Ok so now it's showing things but in an infinite loop! How do I stop this?? Here is the code so far:

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void InternetCharge::displayBetterPlans()
{
	double alt = 0.0;
	double savings = 0.0;


	cout << "Plans that would have saved the customer money: " << endl;
	
	while (plan == 1)
	{
		if (calcPlanCharge(plan) > calcPlanCharge(2))
		{
			alt = calcPlanCharge(2);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 2:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(3))
		{
			alt = calcPlanCharge(3);
			savings = calcPlanCharge(plan) - alt;
			n = n + 1;
			cout << "Plan 3:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(4))
		{
			alt = calcPlanCharge(4);
			savings = calcPlanCharge(plan) - alt;
			n = n + 1;
			cout << "Plan 4:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
	while (plan == 2)
	{
		if (calcPlanCharge(plan) > calcPlanCharge(1))
		{
			alt = calcPlanCharge(1);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 1:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(3))
		{
			alt = calcPlanCharge(3);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 3:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(4))
		{
			alt = calcPlanCharge(4);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 4:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
	while (plan == 3)
	{
		if (calcPlanCharge(plan) > calcPlanCharge(1))
		{
			alt = calcPlanCharge(1);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 1:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(2))
		{
			alt = calcPlanCharge(2);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 2:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(4))
		{
			alt = calcPlanCharge(4);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 4:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
	while (plan == 4)
	{
		if (calcPlanCharge(plan) > calcPlanCharge(1))
		{
			alt = calcPlanCharge(1);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 1:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(2))
		{
			alt = calcPlanCharge(2);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 2:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
		else if (calcPlanCharge(plan) > calcPlanCharge(3))
		{
			alt = calcPlanCharge(3);
			savings = calcPlanCharge(plan) - alt;
			cout << "Plan 3:  Charge: $" << alt << " Savings: $" << savings << endl;
		}
	}
}
halamaker (83)
Figured it out! Now I just gotta figure out why I'm off by .50 every time and I'll be peachy keen.
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