如何用golang写游戏加经验函数不出错

package main

import (
"fmt"
"log"

"github.com/emirpasic/gods/maps/treemap"
)

func main() {
	exp := []int{
		20,
		30,
		40,
		50,
		70,
		300,
		350,
		560,
		650,
		1000,
	}

	expMap := treemap.NewWithIntComparator()

	for i := 0; i < len(exp); i++ {
		expMap.Put(i+1, exp[i])
	}

	fmt.Println(expMap.String())
	addExp := 900
	// 最笨的办法一级一级算
	curLevel := 2
	curExp := 4
	totalExp := curExp + addExp

	// 最清晰的算法逻辑
	for lvIndex := curLevel + 1; lvIndex <= 10; lvIndex++ {
		needExp, ok := expMap.Get(lvIndex)
		if !ok {
			log.Println("逻辑错误, 出错等级:", lvIndex)
			return
		}

		v := needExp.(int)

		if totalExp > v {
			totalExp -= v
			curLevel += 1
		} else {
			break
		}
	}

	curExp = totalExp
	if curLevel >= 10 {
		curExp = 0
	}
	fmt.Println("当前等级:", curLevel, ", 当前经验值:", curExp)
	fmt.Println("hello exp!")
}
output:
TreeMap
map[1:20 2:30 3:40 4:50 5:70 6:300 7:350 8:560 9:650 10:1000]
当前等级: 7 , 当前经验值: 94
hello exp!