添加elo

Author: hero

elo/elo.go

@@ -0,0 +1,47 @@
+package elo
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+)
+
+const (
+	// K is the default K-Factor
+	K = 32
+	// D is the default deviation
+	D = 400
+)
+
+type Elo struct {
+	//输入值
+	A  uint32  //A玩家当前的Rating
+	B  uint32  //B玩家当前的Rating
+	Sa float64 //实际胜负值，胜=1，平=0.5，负=0   传入值默认A的胜负 / 1 A胜利 B失败 / 0 B胜利 A失败
+
+
+}
+
+func EloRating(elo Elo)(a uint32,b uint32) {
+	var (
+		Ea float64 //预期A选手的胜负值
+		Eb float64 //预期B选手的胜负值
+		Ra uint32  //A玩家进行了一场比赛之后的Rating
+		Rb uint32  //B玩家进行了一场比赛之后的Rating
+	)
+	Ea = 1 / (1 + math.Pow(10, float64(elo.B-elo.A)/float64(D)))
+	Ea=Decimal(Ea,"%.2f")
+	Eb = 1-Ea
+	var Sb float64
+	if elo.Sa==0{
+		Sb=1
+	}
+	Ra = elo.A + uint32(Decimal(float64(K)*(elo.Sa-Ea),"%.0f"))
+	Rb = elo.B + uint32(Decimal(float64(K)*(Sb-Eb),"%.0f"))
+	return Ra,Rb
+}
+//f 保留2 位小数 %.2f
+func Decimal(value float64,f string) float64 {
+	value, _ = strconv.ParseFloat(fmt.Sprintf(f, value), 64)
+	return value
+}

game/elo/elo.go

@@ -3,11 +3,13 @@ package elo
 import "testing"
 
 func Test_EloRating(t *testing.T) {
-	 EloRating(Elo{
+	a,b:= EloRating(Elo{
 		 A:  1500,
 		 B:  1600,
 		 Sa: 1,
 	 })
+	t.Log("a",a)
+	t.Log("b",b)
 }
 
 func Test_Decimal(t *testing.T)  {