Add exercises 1.05 - 1.13

chapter_01/exercise_1.05/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+  "fmt"
+  "time"
+)
+
+
+func main() {
+
+  Debug := false
+  LogLevel := "info"
+  startUpTime := time.Now()
+
+  fmt.Println(Debug, LogLevel, startUpTime)
+
+}

chapter_01/exercise_1.06/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+  "fmt"
+  "time"
+)
+
+
+func getConfig() (bool, string, time.Time) {
+
+  return false, "info", time.Now()
+
+}
+
+
+func main() {
+
+  Debug, LogLevel, startUpTime := getConfig()
+  fmt.Println(Debug, LogLevel, startUpTime)
+
+}

chapter_01/exercise_1.07/main.go

@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+
+var defaultOffset = 10
+
+
+func main() {
+
+  offset := 5
+  fmt.Println(offset)
+  offset = 10
+  fmt.Println(offset)
+
+  offset = offset + defaultOffset
+  fmt.Println(offset)
+
+}

chapter_01/exercise_1.08/main.go

@@ -0,0 +1,12 @@
+package main
+
+import "fmt"
+
+
+func main() {
+
+  query, limit, offset := "bat", 10, 0
+  query, limit, offset = "ball", offset, 20
+  fmt.Println(query, limit, offset)
+
+}

chapter_01/exercise_1.09/main.go

@@ -0,0 +1,39 @@
+package main
+
+import "fmt"
+
+
+func main() {
+
+  // Main course
+  var total float64 = 2 * 13
+  fmt.Println("Sub:", total)
+
+  // Drinks
+  total = total + (4 * 2.25)
+  fmt.Println("Sub:", total)
+
+  // Discount
+  total = total - 5
+  fmt.Println("Sub:", total)
+
+  // 10% Tip
+  tip := total * 0.1
+  fmt.Println("Tip:", tip)
+
+  total = total + tip
+  fmt.Println("Total:", total)
+
+  // Split bill
+  split := total / 2
+  fmt.Println("Split:", split)
+
+  // Reward every 5th visit
+  visitCount := 24
+  visitCount = visitCount + 1
+  remainder := visitCount % 5
+  if remainder == 0 {
+    fmt.Println("With this visit, you've earned a reward.")
+  }
+
+}

chapter_01/exercise_1.10/main.go

@@ -0,0 +1,22 @@
+package main
+
+import "fmt"
+
+
+func main() {
+
+  count := 5
+  count += 5
+  fmt.Println(count)
+  count++
+  fmt.Println(count)
+  count--
+  fmt.Println(count)
+  count -= 5
+  fmt.Println(count)
+
+  name := "John"
+  name += " Smith"
+  fmt.Println(name)
+
+}

chapter_01/exercise_1.11/main.go

@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+
+func main() {
+
+  visits := 15
+  fmt.Println("First visit    :", visits == 1)
+  fmt.Println("Return visit   :", visits != 1)
+  fmt.Println("Silver member  :", visits >= 10 && visits < 21)
+  fmt.Println("Gold member    :", visits > 20 && visits <= 30)
+  fmt.Println("Platinum member:", visits > 30)
+
+}

chapter_01/exercise_1.12/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+  "fmt"
+  "time"
+)
+
+
+func main() {
+
+  var count int
+  fmt.Printf("Count: %#v \n", count)
+
+  var discount float64
+  fmt.Printf("Discount: %#v \n", discount)
+
+  var debug bool
+  fmt.Printf("Debug: %#v \n", debug)
+
+  var msg string
+  fmt.Printf("Msg: %#v \n", msg)
+
+  var emails []string
+  fmt.Printf("eMails: %#v \n", emails)
+
+  var startTime time.Time
+  fmt.Printf("Start: %#v \n", startTime)
+
+}

chapter_01/exercise_1.13/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+  "fmt"
+  "time"
+)
+
+
+func main() {
+
+  var count1 *int
+  count2 := new(int)
+  countTemp :=5
+  count3 := &countTemp
+  t := &time.Time{}
+
+  fmt.Printf("count1: %#v\n", count1)
+  fmt.Printf("count2: %#v\n", count2)
+  fmt.Printf("count3: %#v\n", count3)
+  fmt.Printf("time  : %#v\n", t)
+
+}