sum.awk


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

#!/usr/bin/awk -f

### sum.awk
# calculate sum of serialized input


BEGIN {
    OFS = FS
    sign = "[+-]?"
    decimal = "[0-9]+[.]?[0-9]*"
    fraction = "[.][0-9]+"
    exponent = "([Ee]" sign "[0-9]+)?"
    number = "^" sign "(" decimal "|" fraction ")" exponent "$"
}


NF > 0 {
    for (n=1; n<=NF; n++) {
        if ($n ~ number) {
            count += 1
            sum += $n
        }
    }
}


END {
    print "sum", "count"
    print sum, count
}