Add writeups/multiprecision

1 files changed, 37 insertions, 0 deletions

diff --git a/writeups/multiprecision/fibo.mjs b/writeups/multiprecision/fibo.mjs
new file mode 100755
index 0000000..1cc9b10
--- /dev/null
+++ b/writeups/multiprecision/fibo.mjs
@@ -0,0 +1,37 @@
+#!/bin/env node
+
+function do_fibo (num_f) {
+	let a, b, c;
+
+	a = num_f('0');
+	b = num_f('1');
+
+	for (let i = 0; i < 101; i += 1) {
+		c = a + b;
+		console.info(c.toString());
+		b = a;
+		a = c;
+	}
+}
+
+function parse_flag (s) {
+	s = s.toLowerCase();
+
+	if (s === 'true') {
+		return true;
+	}
+	else if (s === 'false') {
+		return false;
+	}
+
+	return Number(s);
+}
+
+const flag = process.argv.length > 2 ? parse_flag(process.argv[2]) : true;
+
+if (flag) {
+	do_fibo(BigInt);
+}
+else {
+	do_fibo(Number);
+}