GO语言常用标准库04---flag读取命令行参数

package main

import (
	"flag"
	"fmt"
	"math"
	"os"
)

/*
go build xxx.go	编译产生同名的exe文件（在当前文件夹下）
go run xxx.go 编译执行二合一（产生的exe文件在临时目录下）
go builde -o yoursister.exe xxx.go 编译产生yoursister.exe文件（在当前文件夹下）
*/

/*简易获取命令行参数：获取命令行上输入的所有字符串*/
func main031() {
	fmt.Println(os.Args)

	//获取rmb参数
	for i,arg := range os.Args{
		if arg == "rmb"{
			fmt.Println("rmb=",os.Args[i+1])
			break
		}
	}
}

//yoursister -name 如花 -age 18 -rmb 0.5 -married true
func main032() {

	//定义一个字符串类型的命令行参数：参数名称name，参数默认值“无名氏”，作用“你妹芳名”
	//得到一个将来存储name参数的值的地址/指针
	namePtr := flag.String("name","无名氏","你妹芳名")

	//定义了整型命令行参数age
	agePtr := flag.Int("age", 0, "你妹芳龄")

	//定义浮点型命令行参数rmb
	rmbPtr := flag.Float64("rmb", 0, "你妹资产")

	//定义布尔型命令行参数married
	marriedPtr := flag.Bool("married", false, "你妹婚否")

	//解析获取参数值
	flag.Parse()

	fmt.Println(*namePtr,*agePtr,*rmbPtr,*marriedPtr)

	//根据你妹的具体信息求得你妹的受欢迎指数
	//...
}

//yoursister -name 如花 -age 18 -rmb 0.5 -married true
func main() {
	var name string//"" 有地址
	var age int//0
	var rmb float64
	var married bool

	/*定义命令行参数*/
	flag.StringVar(&name,"name","无名氏","你妹芳名")
	flag.IntVar(&age,"age",0,"你妹芳龄")
	flag.Float64Var(&rmb,"rmb",0,"你妹资产")
	flag.BoolVar(&married,"married",false,"你妹婚否")

	//解析获取参数值
	flag.Parse()
	fmt.Println(name,age,rmb,married)

	//评估你妹的受欢迎程度
	popularity := GetPopularity(name, age, rmb, married)
	fmt.Printf("你妹的受欢迎程度是%d%%\n",popularity)
}

/*评估某人的受欢迎程度*/
func GetPopularity(name string,age int,rmb float64,married bool) int{

	//预设受欢迎程度为60
	var popularity float64 = 60.0

	//如果名字是四个字以上，受欢迎程度*=1.1
	if len(name) >= 3*4{
		popularity *= 1.1
	}

	//越有钱越受欢迎(以5万为60分，每增加1万，魅力值+=1)
	popularity += (rmb-50000)/10000

	//越年轻越受欢迎
	popularity *= (35.0/float64(age))

	//如果已婚，受欢迎程度*=0.5
	if married {
		popularity *= 0.5
	}

	return int(math.Round(popularity))
}

func test() {
	//fmt.Println(len("西门如花"))
	fmt.Println(GetPopularity("西门耶律不花",20,50000,false))
	fmt.Println(GetPopularity("翠花",80,0.5,true))
}