41 lines
1011 B
C
41 lines
1011 B
C
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/* Driver for routine bessik */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define NRANSI
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#include "nr.h"
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#include "nrutil.h"
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#define MAXSTR 80
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int main(void)
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{
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char txt[MAXSTR];
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int i,nval;
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float ri,rk,rip,rkp,x,xnu,xri,xrk,xrip,xrkp;
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FILE *fp;
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if ((fp = fopen("fncval.dat","r")) == NULL)
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nrerror("Data file fncval.dat not found\n");
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fgets(txt,MAXSTR,fp);
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while (strncmp(txt,"Modified Bessel Functions",25)) {
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fgets(txt,MAXSTR,fp);
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if (feof(fp)) nrerror("Data not found in fncval.dat\n");
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}
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fscanf(fp,"%d %*s",&nval);
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printf("\n%s\n",txt);
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printf("%5s %7s\n%14s %16s %17s %16s\n%14s %16s %17s %16s\n",
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"xnu","x","ri","rk","rip","rkp","xri","xrk","xrip","xrkp");
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for (i=1;i<=nval;i++) {
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fscanf(fp,"%f %f %f %f %f %f",&xnu,&x,&ri,&rk,&rip,&rkp);
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bessik(x,xnu,&xri,&xrk,&xrip,&xrkp);
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printf("%5.2f %5.2f\n\t%16.6e %16.6e %16.6e %16.6e\n",xnu,x,ri,rk,rip,rkp);
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printf("\t%16.6e %16.6e %16.6e %16.6e\n",xri,xrk,xrip,xrkp);
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}
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fclose(fp);
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return 0;
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}
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#undef NRANSI
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