Section5.49 - COMPLETE

Section5 - Exercices S1-2-3-4/49.go

@@ -0,0 +1,95 @@
+/*
+Coding Exercise #1
+
+    Declare a new type type called duration. Have the underlying type be an int.
+
+    Declare a variable of the new type called hour using the var keyword
+
+    In function main:
+
+        print out the value of the variable hour
+
+        print out the type of the variable hour
+
+        assign 3600 to the variable hour using the  = operator
+
+        print out the value of hour
+
+package main
+
+import "fmt"
+
+type duration int
+
+func main() {
+	var hour duration
+	fmt.Printf("hour's type: %T, hour's value: %v\n", hour, hour)
+	hour = 3600
+	fmt.Printf("hour's value %v\n", hour)
+}
+*/
+
+/*
+Coding Exercise #2
+
+There are some errors in the following Go program. Try to identify the errors, change the code and run the program without errors.
+
+    package main
+
+    import "fmt"
+
+    type duration int
+
+    func main() {
+        var hour duration = 3600
+        minute := 60
+        fmt.Println(hour != minute)
+    }
+
+package main
+
+import "fmt"
+
+type duration int
+
+func main() {
+	var hour duration = 3600
+	minute := duration(60)
+	fmt.Println(hour != minute)
+}
+*/
+
+/*
+Coding Exercise #3
+
+    Declare two defined types called mile and kilometer. Have the underlying type be an float64.
+
+    Declare a constant called m2km equals 1.609  ( 1mile=1.609km)
+
+    In function main:
+
+        declare a variable called mileBerlinToParis of type mile with value 655.3
+
+        declare a variable called kmBerlinToParis of type kilometer
+
+        calculate the distance between Berlin and Paris in km by multiplying mileBerlinToParis and m2km. Assign the result to kmBerlinToParis
+
+        print out the distance in km between Berlin and Paris
+*/
+package main
+
+import "fmt"
+
+type mile float64
+type kilometer float64
+
+const m2km = 1.609
+
+func main() {
+	var mileBerlinToParis mile = 655.3 //distance in miles
+	var kmBerlinToParis kilometer
+
+	kmBerlinToParis = kilometer(mileBerlinToParis * m2km)
+	fmt.Printf("Distance in Km from Berlin to Paris is %f\n", kmBerlinToParis)
+
+}