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6. Source code
6.1 sum.c
/* Jacek Radajewski jacek@usq.edu.au */
/* 21/08/2025 */
#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 */
/* 21/08/2025 */
#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 # 21/08/2025 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&
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