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Added basic-struct.go with example of using struct in struct, also calling method.

This commit is contained in:
Gytis Repečka 2018-10-10 22:11:25 +03:00
parent 14079d51e7
commit bb840a479c
Signed by: gytisrepecka
GPG key ID: BE7648906D706003

78
basic-struct.go Normal file
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// Copyright 2018 Gytis Repečka. All rights reserved.
// Use of this source code is governed by a GNU GPL
// license that can be found in the LICENSE file.
package main
import (
"fmt"
)
// Define named structures
type CarMake struct {
makeTitle string
countryOfOrigin string
}
type Car struct {
make CarMake
model string
year int
started bool
}
// Functions (methods)
// Receiving a pointer to Car so can modify it
func (c *Car) Start() {
c.started = true
fmt.Printf("Car %s %s says vrooom!\n", c.make.makeTitle, c.model)
}
func main() {
var carMakes []CarMake
newCarMake := CarMake{makeTitle: "Toyota", countryOfOrigin: "Japan"}
carMakes = append(carMakes, newCarMake)
newCarMake = CarMake{makeTitle: "Renault", countryOfOrigin: "France"}
carMakes = append(carMakes, newCarMake)
newCarMake = CarMake{"Peugeot", "France"}
carMakes = append(carMakes, newCarMake)
var cars []Car
newCar := Car{carMakes[1], "Clio", 1994, false}
cars = append(cars, newCar)
newCar = Car{carMakes[2], "406", 1997, false}
cars = append(cars, newCar)
newCar = Car{carMakes[0], "Yaris", 2000, false}
cars = append(cars, newCar)
fmt.Println("--------------------------")
fmt.Println("Make | Model | Country")
fmt.Println("--------------------------")
for i:=0; i<len(cars); i++ {
fmt.Printf("%s | %s | %s\n", cars[i].make.makeTitle, cars[i].model, cars[i].make.countryOfOrigin)
}
fmt.Println("--------------------------")
// Let's execute struct function (method)
cars[2].Start()
cars[0].Start()
fmt.Println("--------------------------")
fmt.Println("Started cars:")
startedCars := 0
for i:=0; i<len(cars); i++ {
if cars[i].started == true {
fmt.Printf("%s %s\n", cars[i].make.makeTitle, cars[i].model)
startedCars++
}
}
if startedCars == 0 {
fmt.Println("No cars are started.")
} else {
fmt.Printf("Total: %d\n", startedCars)
}
fmt.Println("--------------------------")
}