/* PROGRAM testprogram

   --- testprogram argument1 argument2 < infile > outfile
   --- A barebones program that reads a couple arguments, reads a file, does some
       simple math, and outputs another file. 

      * argument1 = just a number
      * argument2 = another number
      * < infile  = file containing two columns
      * > outfile = output file 
*/

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#define sqr(x) ((x)*(x))
#define PI (3.141592)

int main(int argc, char *argv[])
{
/*---Declare-variables-------------------------------------*/

  int Nmax,Nfile,i,*column1 ;
  double argument1,argument2,x,y,z,*column2 ;

/*---Read-arguments----------------------------------------*/

  sscanf(argv[1],"%lf",&argument1) ;
  sscanf(argv[2],"%lf",&argument2) ;

/*---Print-arguments---------------------------------------*/

  fprintf(stderr,"testprogram> You typed %f and %f\n",argument1,argument2) ;

/*---Do-some-math-and-print--------------------------------*/

  x = argument1 + argument2 ;
  y = argument1 * argument2 ;

  fprintf(stderr,"testprogram> Their sum and product is %f and %f\n",x,y) ;

/*---Allocate-arrrays--------------------------------------*/

  Nmax=1000 ;
  column1=(int *) calloc(Nmax,sizeof(int)) ;
  column2=(double *) calloc(Nmax,sizeof(double)) ;

/*---Read-infile-------------------------------------------*/

  i=0 ;
  while(fscanf(stdin,"%d %lf",&column1[i],&column2[i])!=EOF)
    {
	i++ ;
    }
  Nfile=i ;
  fprintf(stderr,"testprogram> file has %d lines in it\n",Nfile) ;

/*---Do-math-with-arrays-----------------------------------*/

  for(i=0;i<Nfile;i++)
    {
	z = column2[i] * y/x ;
        fprintf(stdout,"%2d  %7.3f\n",column1[i],z) ;
    }
}