/* DoubleAPenny.c - A program to calculate amount of money that
 * would accumulate if a penny were doubled every day for 30 
 * days.
 *
 * Author: Bill Kirby <wjkirby@gmail.com>
 * Written: January 24, 2006
 *
 */
 
#include <stdio.h>

int main(void)
{
	double pennies = 0.0;
	double accumulator = 0.0;
	int dayCounter = 0;

	printf("\nDouble a penny every day for thirty days.\n\n");

	/* Day 1 starts with one penny. */
	pennies = 0.01;
	accumulator = pennies;
	dayCounter = 1;
	printf("Day %d gets %.2f for a total of %.2f\n", \
		dayCounter, pennies, accumulator);
	
	/* For loop that does calculations for days 2 thru 30
	 * and prints the results for each day.
	 */
	for(dayCounter = 2; dayCounter <= 30; dayCounter = dayCounter + 1)
	{
		pennies = pennies * 2;
		accumulator = accumulator + pennies;
		printf("Day %d gets %.2f for a total of %.2f\n", \
			dayCounter, pennies, accumulator);
	}
	printf("\nAfter %d days you would have $%.2f!\n", (dayCounter-1), \
	accumulator);
	printf("Time to buy that house by the lake and retire!!\n\n");
	
	return 0;
}