//City Population
//A city's population is 40,000. Studies show that people move into the city at an annual rate
//of .6% and move out at an annual rate of .4%. The annual birthrate is 1.7%. The annual death
//rate is .9%. Print a table showing the city's population each year for the next 10 years.
//After 10 years, summarize by printing the net increase or decrease and percent of change for
//the decade.
#include <iostream.h>
#include <iomanip.h>

long pop;
float popchange, newpop;
int counter;

main()
{
	counter = 0;
	cout<<"This program calculates a city's population over a decade."<<endl<<endl;
	for(pop = 40000; counter < 10; pop)
	{
		pop = (pop + (pop * .006) - (pop * .004) + (pop * .017) - (pop * .009));
		counter++;
		cout << "Population for Year #"<<counter<<": "<<pop<<"."<<endl;
	}
	newpop = pop;
	cout<<endl<<"Here is the decade summary:"<<endl;
	popchange = (newpop / 40000) * 100;
	cout<<"A change of "<<popchange<<"%."<<endl<<"With a net ";
	if(newpop < 40000)
		cout <<"decrease ";
	else
		cout <<"increase ";
	cout<<"of "<<(newpop - 40000)<<"."<<endl;
	return 0;
}