Go run program properly on linux but on windows not

I am currently learning Go lang. Trying it on different platforms: Linux, Windows When I run code on Linux it runs perfectly, but when I try this program on Windows it doesn't work.

Its just simple cmd calculator which allows simple operations like add number, multiply eg. Its not handling wrong input like characters. It's my first program for adoption Go syntax

What doesn't work:

1. Parsing int
2. Comparing input

Code:

package main

import (
    "bufio"
    "fmt"
    "math"
    "os"
    "strconv"
    "strings"
)

func main() {

    reader := bufio.NewReader(os.Stdin)
    var operation int
    var firstNumber float64
    var secondNumber float64

    fmt.Println("Simple cmd calculator")

    repeat := true

    for repeat {

        fmt.Println("Enter number 1: ")
        firstNumber = getNumber(*reader)

        fmt.Println("Enter number 2: ")
        secondNumber = getNumber(*reader)

        fmt.Println()

        selectOperation(*reader, &operation)

        fmt.Print("You result is: ")

        switch operation {
        case 1:
            fmt.Println(add(firstNumber, secondNumber))
        case 2:
            fmt.Println(subtract(firstNumber, secondNumber))
        case 3:
            fmt.Println(multiply(firstNumber, secondNumber))
        case 4:
            fmt.Println(divide(firstNumber, secondNumber))
        }

        fmt.Println("Do you want to continue? [Y/n]")
        input, _ := reader.ReadString('\n')

        input = strings.Replace(input, "\n", "", -1)

        if !(input == "Y" || input == "y") {
            repeat = false
        }

    }

}

func selectOperation(reader bufio.Reader, operation *int) {
    fmt.Println("1. Add")
    fmt.Println("2. Subtract")
    fmt.Println("3. Multiply")
    fmt.Println("4. Divide")

    fmt.Print("Select operation: ")
    input, _ := reader.ReadString('\n')
    input = strings.Replace(input, "\n", "", -1)
    number, _ := strconv.Atoi(input)
    *operation = number
}

func getNumber(reader bufio.Reader) float64 {

    input, _ := reader.ReadString('\n')
    input = strings.Replace(input, "\n", "", -1)
    convertedNumber, _ := strconv.ParseFloat(input, 64)
    return convertedNumber

}

func add(a float64, b float64) float64 {
    return (math.Round((a+b)*100) / 100)
}

func subtract(a float64, b float64) float64 {
    return (math.Round((a-b)*100) / 100)
}

func multiply(a float64, b float64) float64 {
    return (math.Round(a*b*100) / 100)
}

func divide(a float64, b float64) float64 {
    return (math.Round(a/b*100) / 100)
}

Results:

Linux

Windows

Am I doing something wrong or it's not my bad?