add numerical recipes library

lib/nr/ansi/examples/xsphbes.c

@@ -0,0 +1,40 @@
+
+/* Driver for routine rj */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define NRANSI
+#include "nr.h"
+#include "nrutil.h"
+
+#define MAXSTR 80
+
+int main(void)
+{
+	char txt[MAXSTR];
+	int i,n,nval;
+	float sj,sy,sjp,syp,x,xsj,xsy,xsjp,xsyp;
+	FILE *fp;
+
+	if ((fp = fopen("fncval.dat","r")) == NULL)
+		nrerror("Data file fncval.dat not found\n");
+	fgets(txt,MAXSTR,fp);
+	while (strncmp(txt,"Spherical Bessel Functions",26)) {
+		fgets(txt,MAXSTR,fp);
+		if (feof(fp)) nrerror("Data not found in fncval.dat\n");
+	}
+	fscanf(fp,"%d %*s",&nval);
+	printf("\n%s\n",txt);
+	for (i=1;i<=nval;i++) {
+		fscanf(fp,"%d %f %f %f %f %f",&n,&x,&sj,&sy,&sjp,&syp);
+		printf("%5s %4s\n%14s %16s %17s %16s\n%14s %16s %17s %16s\n",
+			"n","x","sj","sy","sjp","syp","xsj","xsy","xsjp","xsyp");
+		sphbes(n,x,&xsj,&xsy,&xsjp,&xsyp);
+		printf("%5d %5.2f\n\t%16.6e %16.6e %16.6e %16.6e\n",n,x,sj,sy,sjp,syp);
+		printf("\t%16.6e %16.6e %16.6e %16.6e\n",xsj,xsy,xsjp,xsyp);
+	}
+	fclose(fp);
+	return 0;
+}
+#undef NRANSI