Coba Sister

package main

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

func main (){
	akun[3].Name = fmt.Sprint("Penerima")
	akun[3].Saldo = 0
	var w sync.WaitGroup
	var m sync.Mutex
	for i := 0; i < 1000; i++ {
		w.Add(1)
		go increment(&w, &m, i)
	}
	w.Wait()

	fmt.Println("final value of x", x)
	for i:= 0;i<4;i++ {
		fmt.Println(akun[i])
	}
}

var x  = 0
var akun = [4]Bank{
	{
		Name:"Raisul",
		Saldo:100000,
	},
	{
		Name:"Fadhlan",
		Saldo:100000,
	},
	{
		Name:"Faizal",
		Saldo:100000,
	},
	{
		Name:"Ecak",
		Saldo:0,
	},
}

func increment(wg *sync.WaitGroup, m *sync.Mutex, i int) {

	//m.Lock()
	//time.Sleep(1*time.Second)
	x = x + 1
	myrand := random(0, 3)
	transaksi := random(0,10)
	fmt.Println("Random : " , myrand)
	fmt.Println("Transaksi : ",transaksi )
	akun[myrand].Saldo -= transaksi
	akun[3].Saldo += transaksi


	//akun[3].Saldo = akun[3].Saldo + akun[i].Saldo
	//akun[i].Saldo -= akun[i].Saldo
	//m.Unlock()
	wg.Done()
}

type Bank struct {
	Name string `json:"name"`
	Saldo int `json:"saldo"`
}

func random(min, max int) int {
	rand.Seed(time.Now().Unix())
	return rand.Intn(max - min) + min
}