Re-namespacing everything and fixing imports to match

algs4/go/algs4-flips/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"crypto/rand"
+	"fmt"
+	"math"
+	"math/big"
+	"os"
+	"strconv"
+)
+
+import (
+	"github.com/meatballhat/box-o-sand/algs4/go/algs4"
+)
+
+const USAGE string = "Usage: algs4-flips <nflips>"
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println(USAGE)
+		os.Exit(1)
+	}
+
+	nflips, err := strconv.ParseInt(os.Args[1], 10, 32)
+	if err != nil {
+		fmt.Println("Wat.", err)
+		os.Exit(2)
+	}
+
+	heads := algs4.NewCounter("heads")
+	tails := algs4.NewCounter("tails")
+
+	randMax := big.NewInt(2)
+
+	for t := int64(0); t < nflips; t += int64(1) {
+		n, err := rand.Int(rand.Reader, randMax)
+		if err != nil {
+			fmt.Println("Ugh:", err)
+			os.Exit(4)
+		}
+
+		if n.Int64() < 1 {
+			heads.Increment()
+		} else {
+			tails.Increment()
+		}
+	}
+
+	fmt.Println(heads)
+	fmt.Println(tails)
+
+	d := heads.Tally() - tails.Tally()
+
+	fmt.Printf("delta: %d\n", int(math.Abs(float64(d))))
+}