Monte Carlo experiment in Go

coins.go

package main

import (
	"time"
	"math/rand"
	"fmt"
)

func main() {
	startTime := time.Now()

	fmt.Print("How many trials: ")
	var trials int
	_, err := fmt.Scanf("%d", &trials)
	if err != nil {
		panic(err)
	}

	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	var hits int = 0
	var numQuarters int = 8
	var quarterDelta float32 = 6.667
	var quarterRadius float32 = 1.213
	var dimeRadius float32 = 0.895
	var quarterLocations [8] float32

	for i := 0; i < numQuarters; i++ {
		quarterLocations[i] = float32(i + 1) * quarterDelta
	}

	for k := 0; k < trials; k++ {
		var startPoint float32 = float32(r.Intn(60))
		var dimeL float32 = startPoint - dimeRadius
		var dimeR float32 = startPoint + dimeRadius
		for j := 0; j < numQuarters; j++ {
			var quarterL float32 = quarterLocations[j] - quarterRadius
			var quarterR float32 = quarterLocations[j] + quarterRadius

			if dimeR >= quarterL && dimeR <= quarterR {
				hits+=1
				continue
			}

			if dimeL >= quarterL && dimeL <= quarterR {
				hits+=1
				continue
			}
		}
	}

	elapsed := time.Since(startTime)/time.Millisecond
	misses := trials - hits
	println("There were ", hits, " hits")
	println("There were ", misses, " misses")
	println("Took ", elapsed, "ms")

}