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

float PI = 3.14159265358979323846264338327950288419716939937510;
int main ( ) {
	float max = 50000.0;
	
	printf ("*** Using float\n");
	float k = 1.0;
	float v;
	float n = 0.0;
	float oldn = -1.0;
	while (n != oldn && k < max) {
		oldn = n;
		n = n + 1.0/(k*k);
		k = k + 1.0;
	}
	printf ("stopped at %20.18g", n);
	if (n == oldn) {
		printf (" (iteration %2.0f) because no difference in successive sums\n", k);
	} else {
		printf (" because # iterations = max\n");
	}
        printf ("\nActual value is %20.18g\n", PI*PI/6.0);
        return 0;
}