Population program

[IU1]

Edited :)

[Shinigami]

here is your problem
for (year = 1; pop2 < pop1; year++)

"Please Enter the population of town B (must be larger than town A's): ";

[IU1]

Hi, I've put the condition as "pop2 < pop1" since that should be the point at which the loop should logically stop. Isn't it?

[Shinigami]

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

int main()
{
	string city1, city2;
	int pop1, pop2, year = 1;
	double rate1, rate2;

	cout<< "Please enter town A's name: ";
	cin>> city1;

	cout<< "Please enter Town B's name: ";
	cin>> city2;
		
	cout<< "Please Enter the population of town A: ";
	cin>> pop1;
	cout<< "Please Enter the population of town B (must be larger than town A's): ";
	cin>> pop2;
		
	if (pop1 < pop2)
	{
		cout<< "Please enter the growth rate of town A: ";
		cin>> rate1;
		cout<< "Please enter the growth rate of town B (must be less than Town A's): ";
		cin>> rate2;
					
		if (rate1 <= rate2)
		{
			cout<< "ERROR:Growth Rate of Town A must be more than Town B's ";
			cin.ignore(2);
			return 1;
		}
		else if (rate1 > rate2)
		{
			cout << endl << left << setw(7) << "Year" << setw(20) << city1 << city2 << endl;
			while (pop1 < pop2)
			{
				cout << left << setw(7) << year << setw(20) << pop1 << pop2 << endl;
				pop1 += (pop1 * rate1); 
				pop2 += (pop2 * rate2); 
				year++;
			}
			cout << left << setw(7) << year << setw(20) << pop1 << pop2 << endl;
		}
	}
	else
	{
		cout << "ERROR: Town A's population must be less than town B" << endl;
	}

	cin.ignore(2);
	return 0;
}

[IU1]

Thanks Shinigami. However, the numbers seem to be off. The calculation has some error in it.

screenshot:
http://i48.tinypic.com/2h67urq.png

[Shinigami]

No, it works good. Only you use rate as 0.1, 0.2 or similar. It is your formula :D

pop1 = 100 + 100 * 0.1 = 110
if you use 10
pop1 = 100 + 100 * 10 = 1100

[IU1]

Ya, I just realized that!

instead of making the user enter decimals, I've changed the code to:

pop1 += (pop1 * (rate1/100));
pop2 += (pop2 * (rate2/100));

[IU1]

Shinigami, Thanks a lot for all your help!

I would appreciate if you could edit your post with the code since I don't want to get into trouble with my professor!

[Moschops]

http://www.cplusplus.com/forum/articles/40179/

[IU1]

Moschops, I'm sorry. I realize it's counter-productive to this forum's mission but I just want to be on the safer side. Even though I came here with my original code (and 90% of it correctly coded), I just don't want to get into any sort of trouble. I hope you understand where I'm coming from.

[Shinigami]

It should not be a problem as I did not write this code, I only fixed some problems. And You can edit your code by changing < to > in for loop :D. And if you ask for help in forum you most know it will stay here :D

[Moschops]

I hope you understand where I'm coming from.

I do understand. I hope you understand where we're coming from; if you're going to do this, please just don't bother asking at all.

[Catfish]

Helping and being helped is part of normal life. Therefore you come from school, if collaboration is frowned upon.

Edit:

Albatross wrote:

Good day loyal subjects and complete slaves fellow programmers,

Oh it's a deep joke, right? Like, anyone who you help is your bitch fellow programmer, right?

[IU1]

moschops - I understand. Sorry for any trouble.

Shinigami - Thanks once again buddy.