cat

Implement a command like cat to print files to stdout.

Instructions

• os.Stdout
  • This is an io.Writer
• os.Open
  • This is an io.Reader
• io.Copy
  • Use this to copy data from io.Reader to io.Writer
• os.File.Close
  • Always remember to close an os.File

Examples

$ go run cat.go a.txt b.txt
aaaaaaa
a
aa
aaaaa
a
aaaaaaaaaaaa
aa
b
bbb
bbbb
bbbbbb
bb

$ go run cat.go b.txt a.txt
b
bbb
bbbb
bbbbbb
bb
aaaaaaa
a
aa
aaaaa
a
aaaaaaaaaaaa
aa

Error Examples

Print error if a file cannot be found

$ go run cat.go a.txt b.txt notfound.txt
aaaaaaa
a
aa
aaaaa
a
aaaaaaaaaaaa
aa
b
bbb
bbbb
bbbbbb
bb
open notfound.txt: no such file or directory