Added support for m flag

hebrew.txt

@@ -0,0 +1 @@
+דניאל

main.go

@@ -1,12 +1,14 @@
 package main
 
 import (
+	"bufio"
 	"bytes"
 	"flag"
 	"fmt"
 	"io"
 	"os"
 	"slices"
+	"unicode/utf8"
 )
 
 func byteCounter(f *os.File) {
@@ -75,11 +77,31 @@ func wordCounter(f io.Reader) {
 	}
 }
 
+func charCounter(f *os.File) {
+	var line string
+	var err error
+	r := bufio.NewReader(f)
+	count := 0
+
+	for err == nil {
+		line, err = r.ReadString('\n')
+		count += utf8.RuneCountInString(line)
+	}
+
+	if err != io.EOF {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(count)
+}
+
 func main() {
 
-	cFlag := flag.Bool("c", false, "print the byte counts")
-	lFlag := flag.Bool("l", false, "print the line counts")
-	wFlag := flag.Bool("w", false, "print the word counts")
+	cFlag := flag.Bool("c", false, "print the byte count")
+	lFlag := flag.Bool("l", false, "print the line count")
+	wFlag := flag.Bool("w", false, "print the word count")
+	mFlag := flag.Bool("m", false, "print the character count")
 	flag.Parse()
 	fileName := flag.Arg(0)
 
@@ -103,5 +125,7 @@ func main() {
 		lineCounter(f)
 	case *wFlag:
 		wordCounter(f)
+	case *mFlag:
+		charCounter(f)
 	}
 }