#include <stdio.h>
#include <GL/glut.h>

int main() {
    GLfloat a, t;

    a = 1.0;

    do {
	printf("a = %.10f\n", a);
	a = a / 2.0;
	t = 1.0 + a;
    } while ( t > 1.0 );

    a = a + a;

    printf("Estimated GLfloat epsilon = %.10f\n", a);

    return(0);
}