Write the "percent" program (described below) in Awk. A solution appears at the end of this page.
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Write a program named percent - total and percentage calculation in Awk.
In the input, the first field in each line is an identifier (any string). The second field in each line is a non-negative number.
The program calculates the total of all the numbers and the percentage contributed by each line. The percent contribution of each line is the number on that line, divided by the total, times one hundred.
The program generates this output: It prints a blank line, then prints out a sequence of lines in the same order as the input lines, each line showing the identifier, number, and percent contribution. The beginning of each output line shows the identifier and number exactly as they appear in the input, then a comma after the number, then the percent contribution, then a percent sign. After all the data lines the program prints out another blank line, then prints out the total on the last line.
Here is a sample program run:
$ awk -f percent Washington 3 Oregon 2 California 5 Washington 3, 30% Oregon 2, 20% California 5, 50% Total: 10
Here is a solution:
# Calculate total as we read file, storing data in arrays
{ id[NR] = $1; num[NR] = $2; total = total + $2 }
END {
print ""
for (i=1; i<=NR; i=i+1) {
print id[i] " " num[i] ", " 100.0*num[i]/total "%"
}
print ""
print "Total: " total
}