#include <stdio.h>
#include <stdlib.h>
#include <math.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main()
{
	const double ANSWER = 3.14159;
	double response;

	printf("what is the value of pi?\n");
	scanf("%lf", &response);
	//printf("%lf",fabs(response-ANSWER));
	while (fabs(response-ANSWER)>0.0001)
	{
		//printf("%lf",fabs(response-ANSWER));
		printf("try again!\n");
		scanf("%lf", response);
	}

	printf("close enough!\n");

	return 0;
}