add: printf exercises

07-printf/exercises/04-print-the-temperature/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Print the Temperature
+//
+//  Print the current temperature in your area using Printf
+//
+// NOTE
+//  Do not use %v verb
+//  Output "shouldn't" be like 29.500000
+//
+// EXPECTED OUTPUT
+//  Temperature is 29.5 degrees.
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/04-print-the-temperature/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("Temperature is %.1f degrees.\n", 29.5)
+}