6. ¹Ø±×¸²

6.1 sum.c

/* Jacek Radajewski jacek@usq.edu.au*/

  /* 21/08/1998 */
#include <stdio.h>
  #include <math.h>
int main (void) {
  double result = 0.0;
    double number = 0.0;
    char string[80];

  while (scanf("%s", string) != EOF) {
    number = atof(string);
      result = result + number;
    }
  printf("%lf\n", result);
  return 0;
}

6.2 sigmasqrt.c

/* Jacek Radajewski jacek@usq.edu.au */

  /* 21/08/1998 */
#include <stdio.h>
  #include <math.h>
int main (int argc, char** argv) {
  long number1, number2, counter;
    double result;
  if (argc < 3) {
      printf ("usage : %s number1 number2\n",argv[0]);
      exit(1);
    } else {
      number1 = atol (argv[1]);
      number2 = atol (argv[2]);
      result = 0.0;
    }
  for (counter = number1; counter <= number2; counter++) {
      result = result + sqrt((double)counter);
    }
  printf("%lf\n", result);
  return 0;
}

6.3 prun.sh

#!/bin/bash # Jacek Radajewski jacek@usq.edu.au

  # 21/08/1998
export SIGMASQRT=/home/staff/jacek/beowulf/HOWTO/example1/sigmasqrt
# $OUTPUT must be a named pipe
  # mkfifo output
export OUTPUT=/home/staff/jacek/beowulf/HOWTO/example1/output
rsh scilab01 $SIGMASQRT         1  50000000 > $OUTPUT < /dev/null&
  rsh scilab02 $SIGMASQRT  50000001 100000000 > $OUTPUT < /dev/null&
  rsh scilab03 $SIGMASQRT 100000001 150000000 > $OUTPUT < /dev/null&
  rsh scilab04 $SIGMASQRT 150000001 200000000 > $OUTPUT < /dev/null&
  rsh scilab05 $SIGMASQRT 200000001 250000000 > $OUTPUT < /dev/null&
  rsh scilab06 $SIGMASQRT 250000001 300000000 > $OUTPUT < /dev/null&
  rsh scilab07 $SIGMASQRT 300000001 350000000 > $OUTPUT < /dev/null&
  rsh scilab08 $SIGMASQRT 350000001 400000000 > $OUTPUT < /dev/null&
  rsh scilab09 $SIGMASQRT 400000001 450000000 > $OUTPUT < /dev/null&
  rsh scilab10 $SIGMASQRT 450000001 500000000 > $OUTPUT < /dev/null&
  rsh scilab11 $SIGMASQRT 500000001 550000000 > $OUTPUT < /dev/null&
  rsh scilab12 $SIGMASQRT 550000001 600000000 > $OUTPUT < /dev/null&
  rsh scilab13 $SIGMASQRT 600000001 650000000 > $OUTPUT < /dev/null&
  rsh scilab14 $SIGMASQRT 650000001 700000000 > $OUTPUT < /dev/null&
  rsh scilab15 $SIGMASQRT 700000001 750000000 > $OUTPUT < /dev/null&
  rsh scilab16 $SIGMASQRT 750000001 800000000 > $OUTPUT < /dev/null&
  rsh scilab17 $SIGMASQRT 800000001 850000000 > $OUTPUT < /dev/null&
  rsh scilab18 $SIGMASQRT 850000001 900000000 > $OUTPUT < /dev/null&
  rsh scilab19 $SIGMASQRT 900000001 950000000 > $OUTPUT < /dev/null&
  rsh scilab20 $SIGMASQRT 950000001 1000000000 > $OUTPUT < /dev/null&