Learning about formatIO

formatIO/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	var tlc, tcc, twc int
+	for _, fname := range os.Args[1:] {
+
+		var lc, cc, wc int
+		file, err := os.Open(fname)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			continue
+		}
+		defer file.Close()
+
+		scan := bufio.NewScanner(file)
+		for scan.Scan() {
+			s := scan.Text()
+
+			wc += len(strings.Fields(s))
+			cc += len(s)
+			lc++
+		}
+		tlc += lc
+		tcc += cc
+		twc += wc
+		if err := scan.Err(); err != nil {
+			fmt.Printf("Invalid Input: %s", err)
+		}
+
+		fmt.Printf("%5d %5d %5d %s\n", lc, cc, wc, fname)
+	}
+	fmt.Printf("%5d %5d %5d %s\n", tlc, tcc, twc, "total")
+}