/*************************************************************
 * ruleof72.cpp calculates the approximate time it takes to double
 * a user's investment.
 * Input: Annual interest rate as a percent
 *
 * Output : Number of years it takes to double the investment
 * Programmed By: Mark Cruz
 * Block 2B
 * Date 9/24/2002
 ***************************************************************/



#include <iostream.h>					// cin, cout, <<, >>
#include <math.h>						// pow()

int main()

{
	

	cout << "Howdy, please enter your annual interest as a percent:";
	double interest;
	cin >> interest;
	
	
	double year = 72/interest;
	

	cout <<"\nThe amount of time it will take to double your investment is "
		 << year << " years. \n ";
	
	cout << endl;
		

     return  0;
	/* 	Howdy, please enter your annual interest as a percent:12.5

       The amount of time it will take to double your investment is 5.76 years.
       Press any key to continue


       Howdy, please enter your annual interest as a percent:8

       The amount of time it will take to double your investment is 9 years.
       Press any key to continue

       Howdy, please enter your annual interest as a percent:4

       The amount of time it will take to double your investment is 18 years.
       Press any key to continue




 */

}