Demo StdIO in Go

demostdinout2.go

package main

import (
	"fmt"
	"strings"
)

func main() {
	// assuming user inputs 10, 5, 7
	var i, j int
	var s string

	r := strings.NewReader("10 5 7")

	fmt.Fscan(r, &i) // reads just 10
	fmt.Print(i)     // print result without a new line

	fmt.Fscanf(r, "%d %d", &i, &j) // reads 5 and 7 next
	fmt.Printf(", %d, %d\n", i, j) // seperate result with comma and then print a new line C-style

	r = strings.NewReader("10-5-7")
	fmt.Fscanln(r, &s) // reads all three numbers (without spaces) as text
	fmt.Println(s)     // output all three as text
}