Initial commit

.gitignore

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+.vscode
+stopwatch

go.mod

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+module stopwatch
+
+go 1.24.1

main.go

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+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	var start time.Time
+	var elapsed time.Duration
+	var running bool
+
+	go func() {
+		for {
+			time.Sleep(1 * time.Second)
+			if running {
+				elapsed = time.Since(start)
+				fmt.Printf("\rElapsed Time: %02d:%02d:%02d", int(elapsed.Hours()), int(elapsed.Minutes())%60, int(elapsed.Seconds())%60)
+			}
+		}
+	}()
+
+	for {
+		fmt.Println("> s: Start, p: Pause, r: Reset, q: Quit")
+		var input string
+		fmt.Scanln(&input)
+
+		switch input {
+		case "s":
+			if !running {
+				start = time.Now().Add(-elapsed)
+				running = true
+				fmt.Println("Stopwatch started.")
+			}
+		case "p":
+			if running {
+				running = false
+				fmt.Printf("\nPaused at: %02d:%02d:%02d\n", int(elapsed.Hours()), int(elapsed.Minutes())%60, int(elapsed.Seconds())%60)
+			}
+		case "r":
+			start = time.Time{}
+			elapsed = 0
+			running = false
+			fmt.Println("\nStopwatch reset.")
+		case "q":
+			fmt.Println("\nExiting")
+			return
+		default:
+			fmt.Println("\nInvalid input, please try again.")
+		}
+	}
+}