Update all new Tasks

Task/File-input-output/Go/file-input-output-1.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+    "fmt"
+    "io/ioutil"
+)
+
+func main() {
+    b, err := ioutil.ReadFile("input.txt")
+    if err != nil {
+        fmt.Println(err)
+        return
+    }
+    if err = ioutil.WriteFile("output.txt", b, 0666); err != nil {
+        fmt.Println(err)
+    }
+}

Task/File-input-output/Go/file-input-output-2.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+    "io"
+    "log"
+    "os"
+)
+
+func CopyFile(out, in string) (err error) {
+    var inf, outf *os.File
+    inf, err = os.Open(in)
+    if err != nil {
+        return
+    }
+    defer func() {
+        cErr := inf.Close()
+        if err == nil {
+            err = cErr
+        }
+    }()
+    outf, err = os.Create(out)
+    if err != nil {
+        return
+    }
+    _, err = io.Copy(outf, inf)
+    cErr := outf.Close()
+    if err == nil {
+        err = cErr
+    }
+    return
+}
+
+func main() {
+    if err := CopyFile("output.txt", "input.txt"); err != nil {
+        log.Fatal(err)
+    }
+}