removed QWQNG, added stdin

RandTest/Stat.cpp

@@ -0,0 +1,53 @@
+//#include "StdAfx.h"
+#include "Stat.h"
+#include "math.h"
+
+CStat::CStat(void)
+{
+}
+
+CStat::~CStat(void)
+{
+}
+
+// Input z-score, returns cumulative normal distribution value
+// Accuracy better than 1% to z=+/-7.5; .05% to z=+/-4.
+double CStat::ZtoP( double zScore )
+{
+	double retval;
+
+	// calculation variables
+	double w;
+	double y;
+	double t;
+	double num;
+	double denom;
+
+	// check
+	if ( zScore > 8. )
+	{
+		zScore = 8.;
+	}
+	else 
+	{
+		if ( zScore < -8. )
+			zScore = -8.;
+	}
+
+
+	// calculation constants
+	double c[8];
+	c[1] = 2.506628275;    c[2] = 0.31938153;     c[3] = -0.356563782;    c[4] = 1.781477937;
+	c[5] = -1.821255978;   c[6] = 1.330274429;    c[7] = 0.2316419;
+
+	w = (zScore>=0)? 1 : -1;
+	t = 1. + (c[7]*w*zScore);
+	y = 1./t;
+
+	num = c[2] + (c[6] + (c[5]*t) + (c[4]*t*t) + (c[3]*t*t*t)) / (t*t*t*t) ;
+	denom = c[1] * exp( .5*zScore*zScore ) * t;
+
+	retval = 0.5 + w * ( .5 - (num/denom) );
+
+	return retval;
+}