add numerical recipes library

lib/nr/ansi/recipes/simp1.c

@@ -0,0 +1,26 @@
+
+#include <math.h>
+
+void simp1(float **a, int mm, int ll[], int nll, int iabf, int *kp,
+	float *bmax)
+{
+	int k;
+	float test;
+
+	if (nll <= 0)
+		*bmax=0.0;
+	else {
+		*kp=ll[1];
+		*bmax=a[mm+1][*kp+1];
+		for (k=2;k<=nll;k++) {
+			if (iabf == 0)
+				test=a[mm+1][ll[k]+1]-(*bmax);
+			else
+				test=fabs(a[mm+1][ll[k]+1])-fabs(*bmax);
+			if (test > 0.0) {
+				*bmax=a[mm+1][ll[k]+1];
+				*kp=ll[k];
+			}
+		}
+	}
+}