fix: coding style and file format for chapter 9.

eBook/exercises/chapter_9/dlinked_list.go

@@ -1,28 +1,29 @@
-// Q20_linked_list.go
+// Q20_linked_list.go
-package main
+package main
-
+
-import (
+import (
-	"fmt"
+	"container/list"
-	"container/list"
+	"fmt"
-)
+)
-
+
-func main() {
+func main() {
-	lst := list.New()
+	lst := list.New()
-	lst.PushBack(100)
+	lst.PushBack(100)
-	lst.PushBack(101)
+	lst.PushBack(101)
-	lst.PushBack(102)
+	lst.PushBack(102)
-	// fmt.Println("Here is the double linked list:\n", lst)
+	// fmt.Println("Here is the double linked list:\n", lst)
-	for e := lst.Front(); e != nil; e = e.Next() {
+	for e := lst.Front(); e != nil; e = e.Next() {
-		// fmt.Println(e)
+		// fmt.Println(e)
-		fmt.Println(e.Value)
+		fmt.Println(e.Value)
-	}
+	}
-}
+}
-/* Example output:
+
-&{0x12542bc0 <nil> 0x12547590 1}
+/* Example output:
-&{0x12542ba0 0x12542be0 0x12547590 2}
+&{0x12542bc0 <nil> 0x12547590 1}
-&{<nil> 0x12542bc0 0x12547590 4}
+&{0x12542ba0 0x12542be0 0x12547590 2}
-
+&{<nil> 0x12542bc0 0x12547590 4}
-100
+
-101
+100
-102
+101
-*/
+102
+*/

eBook/exercises/chapter_9/even/even.go

@@ -1,6 +1,6 @@
-// even.go
+// even.go
-package even
+package even
-
+
-func Even(i int) bool {		// exported function
+func Even(i int) bool { // exported function
-	return i%2 == 0
+	return i%2 == 0
-}
+}

eBook/exercises/chapter_9/fibo/fibonacci.go

@@ -1,33 +1,35 @@
-package fibo
+package fibo
-
+
-/*
+/*
-func Fibonacci(n int) (res int) {
+func Fibonacci(n int) (res int) {
-	if n <= 1 {
+	if n <= 1 {
-		res = 1
+		res = 1
-	} else {
+	} else {
-		res = Fibonacci(n-1) + Fibonacci(n-2)
+		res = Fibonacci(n-1) + Fibonacci(n-2)
-	}
+	}
-	return
+	return
-}
+}
-*/
+*/
-// accepts a general operation op:
+// accepts a general operation op:
-func Fibonacci(op string, n int) (res int) {
+func Fibonacci(op string, n int) (res int) {
-	if n <= 1 {
+	if n <= 1 {
-		switch op {
+		switch op {
-			case "+":
+		case "+":
-				res = 1
+			res = 1
-			case "*":
+		case "*":
-				res = 2
+			res = 2
-			default: res = 0
+		default:
-		}
+			res = 0
-	} else {
+		}
-		switch op {
+	} else {
-			case "+":
+		switch op {
-				res = Fibonacci(op, n-1) + Fibonacci(op, n-2)
+		case "+":
-			case "*":
+			res = Fibonacci(op, n-1) + Fibonacci(op, n-2)
-				res = Fibonacci(op, n-1) * Fibonacci(op, n-2)
+		case "*":
-			default: res = 0
+			res = Fibonacci(op, n-1) * Fibonacci(op, n-2)
-		}
+		default:
-	}
+			res = 0
-	return
+		}
-}
+	}
+	return
+}

eBook/exercises/chapter_9/greetings/greetings.go

@@ -1,27 +1,26 @@
-package greetings
+package greetings
-
+
-import "time"
+import "time"
-
+
-func GoodDay(name string) string {
+func GoodDay(name string) string {
-	return "Good Day " + name
+	return "Good Day " + name
-}
+}
-
+
-func GoodNight(name string) string{
+func GoodNight(name string) string {
-	return "Good Night " + name
+	return "Good Night " + name
-}
+}
-
+
-func IsAM() bool {
+func IsAM() bool {
-	localTime := time.Now()
+	localTime := time.Now()
-	return localTime.Hour() <= 12
+	return localTime.Hour() <= 12
-}
+}
-
+
-func IsAfternoon() bool {
+func IsAfternoon() bool {
-	localTime := time.Now()
+	localTime := time.Now()
-	return localTime.Hour() <= 18
+	return localTime.Hour() <= 18
-}
+}
-
+
-func IsEvening() bool {
+func IsEvening() bool {
-	localTime := time.Now()
+	localTime := time.Now()
-	return localTime.Hour() <= 22
+	return localTime.Hour() <= 22
-}
+}
-

eBook/exercises/chapter_9/main_fibo.go

@@ -1,62 +1,61 @@
-package main
+package main
-
+
-import (
+import (
-	"fmt"
+	"./fibo/fibo"
-	"./fibo/fibo"
+	"fmt"
-)
+)
-
+
-var nextFibo int
+var nextFibo int
-var op string
+var op string
-
+
-func main() {
+func main() {
-	/*
+	/*
-	result := 0
+		result := 0
-	for i:=0; i <= 10; i++ {
+		for i:=0; i <= 10; i++ {
-		result = fibo.Fibonacci(i) 
+			result = fibo.Fibonacci(i)
-		fmt.Printf("fibonacci(%d) is: %d\n", i, result)
+			fmt.Printf("fibonacci(%d) is: %d\n", i, result)
-	}
+		}
-	*/
+	*/
-	op = "+"
+	op = "+"
-	calls()
+	calls()
-	fmt.Println("Change of operation from + to *")
+	fmt.Println("Change of operation from + to *")
-	nextFibo = 0
+	nextFibo = 0
-	op = "*"
+	op = "*"
-	calls()
+	calls()
-}
+}
-
+
-func calls() {
+func calls() {
-	next()
+	next()
-	fmt.Println("...")
+	fmt.Println("...")
-	next()
+	next()
-	fmt.Println("...")
+	fmt.Println("...")
-	next()
+	next()
-	fmt.Println("...")
+	fmt.Println("...")
-	next()
+	next()
-}
+}
-
+
-func next() {
+func next() {
-	result := 0
+	result := 0
-	nextFibo++
+	nextFibo++
-	result = fibo.Fibonacci(op, nextFibo) 
+	result = fibo.Fibonacci(op, nextFibo)
-	fmt.Printf("fibonacci(%d) is: %d\n", nextFibo, result)
+	fmt.Printf("fibonacci(%d) is: %d\n", nextFibo, result)
-}
+}
-/* *****************************************************************
+
-Output is:
+/* *****************************************************************
-fibonacci(1) is: 1
+Output is:
-...
+fibonacci(1) is: 1
-fibonacci(2) is: 2
+...
-...
+fibonacci(2) is: 2
-fibonacci(3) is: 3
+...
-...
+fibonacci(3) is: 3
-fibonacci(4) is: 5
+...
-Change of operation from + to *
+fibonacci(4) is: 5
-fibonacci(1) is: 2
+Change of operation from + to *
-...
+fibonacci(1) is: 2
-fibonacci(2) is: 4
+...
-...
+fibonacci(2) is: 4
-fibonacci(3) is: 8
+...
-...
+fibonacci(3) is: 8
-fibonacci(4) is: 32
+...
-********************************************************************/
+fibonacci(4) is: 32
-
+********************************************************************/
-

eBook/exercises/chapter_9/main_greetings.go

@@ -1,22 +1,22 @@
-package main
+package main
-
+
-import (
+import (
-	"fmt"
+	"./greetings/greetings"
-	"./greetings/greetings"
+	"fmt"
-)
+)
-
+
-func main() {
+func main() {
-	name := "James"
+	name := "James"
-	fmt.Println(greetings.GoodDay(name))
+	fmt.Println(greetings.GoodDay(name))
-	fmt.Println(greetings.GoodNight(name))
+	fmt.Println(greetings.GoodNight(name))
-	
+
-	if greetings.IsAM() {
+	if greetings.IsAM() {
-		fmt.Println("Good morning", name)
+		fmt.Println("Good morning", name)
-	} else if greetings.IsAfternoon(){
+	} else if greetings.IsAfternoon() {
-		fmt.Println("Good afternoon", name)
+		fmt.Println("Good afternoon", name)
-	} else if greetings.IsEvening(){
+	} else if greetings.IsEvening() {
-		fmt.Println("Good evening", name)
+		fmt.Println("Good evening", name)
-	} else {
+	} else {
-		fmt.Println("Good night", name)
+		fmt.Println("Good night", name)
-	}
+	}
-}
+}

eBook/exercises/chapter_9/main_oddeven.go

@@ -1,13 +1,13 @@
-// test_oddeven.go
+// test_oddeven.go
-package main
+package main
-
+
-import (
+import (
-	"fmt"
+	"./even/even"
-	"./even/even"
+	"fmt"
-)
+)
-
+
-func main() {
+func main() {
-	for i:=0; i<=100; i++ {
+	for i := 0; i <= 100; i++ {
-		fmt.Printf("Is the integer %d even? %v\n", i, even.Even(i)) 
+		fmt.Printf("Is the integer %d even? %v\n", i, even.Even(i))
-	}
+	}
-}
+}

eBook/exercises/chapter_9/size_int.go

@@ -1,14 +1,15 @@
-// size_int.go
+// size_int.go
-package main
+package main
-
+
-import (
+import (
-	"fmt"
+	"fmt"
-	"unsafe"
+	"unsafe"
-)
+)
-
+
-func main() {
+func main() {
-	var i int = 10
+	var i int = 10
-	size := unsafe.Sizeof(i)
+	size := unsafe.Sizeof(i)
-	fmt.Println("The size of an int is: ", size)
+	fmt.Println("The size of an int is: ", size)
-}
+}
-// The size of an int is:  4
+
+// The size of an int is:  4