📄 beowulf-howto-6.html

📁 Linux初学者最好的老师就是howto了。相当于函数man。
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      <a href="Beowulf-HOWTO-5.html"><img alt="Previous" src="prev.gif" width="16" height="16"></a> <a href="Beowulf-HOWTO.html#toc6"><img alt="Contents" src="toc.gif" width="16" height="16"></a>
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      <h2><a name="s6">6. 原始碼</a></h2> 
      <p>　 
      <h2><a name="sum"></a><a name="ss6.1">6.1 sum.c</a></h2> 
      <p>　
      <pre>/* Jacek Radajewski jacek@usq.edu.au */
/* 21/08/1998 */

#include &lt;stdio.h&gt;
#include &lt;math.h&gt;

int main (void) {

  double result = 0.0;
  double number = 0.0;
  char string[80];
  

  while (scanf(&quot;%s&quot;, string) != EOF) {

    number = atof(string);
    result = result + number;
  }
    
  printf(&quot;%lf\n&quot;, result);
  
  return 0;
  
}
</pre>
      <p>　
      <h2><a name="sigmasqrt"></a><a name="ss6.2">6.2 sigmasqrt.c</a></h2> 
      <p>　
      <pre>/* Jacek Radajewski jacek@usq.edu.au */
/* 21/08/1998 */

#include &lt;stdio.h&gt;
#include &lt;math.h&gt;

int main (int argc, char** argv) {

  long number1, number2, counter;
  double result;
  
  if (argc &lt; 3) {
    printf (&quot;usage : %s number1 number2\n&quot;,argv[0]);
    exit(1);
  } else {
    number1 = atol (argv[1]);
    number2 = atol (argv[2]);
    result = 0.0;
  }

  for (counter = number1; counter &lt;= number2; counter++) {
    result = result + sqrt((double)counter);
  }
    
  printf(&quot;%lf\n&quot;, result);
  
  return 0;
  
}
</pre>
      <p>　
      <p>　
      <h2><a name="prun"></a><a name="ss6.3">6.3 prun.sh</a></h2> 
      <p>　
      <p>　
      <pre>#!/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 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab02 $SIGMASQRT  50000001 100000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab03 $SIGMASQRT 100000001 150000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab04 $SIGMASQRT 150000001 200000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab05 $SIGMASQRT 200000001 250000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab06 $SIGMASQRT 250000001 300000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab07 $SIGMASQRT 300000001 350000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab08 $SIGMASQRT 350000001 400000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab09 $SIGMASQRT 400000001 450000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab10 $SIGMASQRT 450000001 500000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab11 $SIGMASQRT 500000001 550000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab12 $SIGMASQRT 550000001 600000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab13 $SIGMASQRT 600000001 650000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab14 $SIGMASQRT 650000001 700000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab15 $SIGMASQRT 700000001 750000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab16 $SIGMASQRT 750000001 800000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab17 $SIGMASQRT 800000001 850000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab18 $SIGMASQRT 850000001 900000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab19 $SIGMASQRT 900000001 950000000 &gt; $OUTPUT &lt; /dev/null&amp;
rsh scilab20 $SIGMASQRT 950000001 1000000000 &gt; $OUTPUT &lt; /dev/null&amp;
</pre>
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