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#!/usr/local/bin/node
//
// See ../README.md
//
//
// Run as: node ch-1.js [plain | compute]
//
let PLAIN = 0
let COMPUTE = 1
let COUNT = 20
function divisor_sum (n) {
let sum = 0
for (let i = 2; i <= Math . floor (n / 2); i ++) {
if (n % i == 0) {
sum += i
}
}
return (sum)
}
let type = PLAIN
if (process . argv . length > 2 &&
process . argv [2] == "compute") {
type = COMPUTE
}
if (type == PLAIN) {
console . log ("0, 0, 0, 2, 0, 5, 0, 6, 3, 7, " +
"0, 15, 0, 9, 8, 14, 0, 20, 0, 21")
}
if (type == COMPUTE) {
for (let i = 1; i <= COUNT; i ++) {
if (i > 1) {
process . stdout . write (", ")
}
process . stdout . write (divisor_sum (i) . toString ())
}
process . stdout . write ("\n")
}
|
