package main

import (
        "fmt"
        "io"
        "os"
)

func main() {

        n1 := askNumber(os.Stdin)
        n2 := askNumber(os.Stdin)
        sum := add(n1, n2)
        printSum(os.Stdout, sum)
}

func add(n1, n2 float64) float64 {
        return n1 + n2
}

func askNumber(in io.Reader) float64 {
        fmt.Println("Type a number:")
        n := 0.0
        fmt.Fscanf(in, "%f\n", &n)

        return n
}

func printSum(out io.Writer, sum float64) {
        fmt.Fprintln(out, "The sum is:", sum)
}