Added ability to input custom delay

golangr/counter/main.go

@@ -3,10 +3,11 @@ package main
 import (
 	"fmt"
 	"os"
+	"strconv"
 	"time"
 )
 
-var delay float64
+var delay time.Duration
 var num int16
 
 func clear() {
@@ -14,22 +15,20 @@ func clear() {
 }
 
 func main() {
-
 	if len(os.Args) != 2 {
-		fmt.Println("Not enough arguments")
+		fmt.Println("Usage: ./counter 1000 (measured in miliseconds)")
 		os.Exit(1)
 	}
 
-	fmt.Println("How much delay in seconds?")
-	timer, err := fmt.Scanln(num)
-	_ = timer
+	delay, err := strconv.Atoi(os.Args[1])
+
 	if err != nil {
-		fmt.Println(err)
+		fmt.Printf("\nERROR:\n%v\n", err)
 	}
 
 	for i := 0; true; i++ {
-		time.Sleep(100 * time.Millisecond)
 		clear()
 		fmt.Println(i)
+		time.Sleep(time.Duration(delay) * time.Millisecond)
 	}
 }