From e5041f6923042185275d1faa9a65a7dd5d1053e7 Mon Sep 17 00:00:00 2001
From: "Muhammad, Hammad" <muhammad@nisum.com>
Date: Fri, 3 Mar 2023 15:39:22 +0500
Subject: [PATCH] added code to force to implement all interface functions
---
input_file.txt | 1 -
main.go | 40 ++++++++++++++++++++++------------------
2 files changed, 22 insertions(+), 19 deletions(-)
delete mode 100644 input_file.txt
diff --git a/input_file.txt b/input_file.txt
deleted file mode 100644
index 8a894f3..0000000
--- a/input_file.txt
+++ /dev/null
@@ -1 +0,0 @@
-Hello World !!! From the file
\ No newline at end of file
diff --git a/main.go b/main.go
index 1362fea..04838d4 100644
--- a/main.go
+++ b/main.go
@@ -1,28 +1,32 @@
package main
-import (
- "bufio"
- "fmt"
- "os"
-)
+import "fmt"
-func main() {
- fileName := os.Args[1]
+type ShapeCalculator interface {
+ Area() int
+ Perimeter() int
+}
- f, err := os.Open(fileName)
- if err != nil {
- fmt.Println("Error : ", err)
- os.Exit(1)
- }
+type Rectangle struct {
+ Width int
+ Height int
+}
- defer f.Close()
+func (r *Rectangle) Area() int {
+ return r.Width * r.Height
+}
- scanner := bufio.NewScanner(f)
+// func (r *Rectangle) Perimeter() int {
+// return r.Width * r.Height
+// }
- for scanner.Scan() {
+// uncomment the following line to guarantee that Implementation implements all methods of SomeInterface
+// var _ ShapeCalculator = (*Rectangle)(nil) // ↠this is the line
- fmt.Println(scanner.Text())
+func main() {
+ rect := &Rectangle{
+ Width: 10,
+ Height: 3,
}
+ fmt.Println(rect.Area())
}
-
-//Execute with file_name as service argument
--
2.18.1