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add: struct exercises and quiz

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Inanc Gumus
2019-05-08 14:02:32 +03:00
parent dcf3b26791
commit 122947d990
13 changed files with 516 additions and 57 deletions
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21
24-structs/exercises/00-name/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: ??
//
//
// EXPECTED OUTPUT
//
//
// ---------------------------------------------------------
func main() {
}

12
24-structs/exercises/00-name/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
func main() {
}

39
24-structs/exercises/01-warmup/main.go Normal file
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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: Warm Up
//
// Starting with this exercise, you'll build a command-line
// game store.
//
// 1. Declare the following structs:
//
// + item: id (int), name (string), price (int)
//
// + game: embed the item, genre (string)
//
//
// 2. Create a game slice using the following data:
//
// id name price genre
//
// 1 god of war 50 action adventure
// 2 x-com 2 30 strategy
// 3 minecraft 20 sandbox
//
//
// 3. Print all the games.
//
// EXPECTED OUTPUT
// Please run the solution to see the output.
// ---------------------------------------------------------
func main() {
}

39
24-structs/exercises/01-warmup/solution/main.go Normal file
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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() {
type item struct {
id int
name string
price int
}
type game struct {
item
genre string
}
games := []game{
{
item: item{id: 1, name: "god of war", price: 50},
genre: "action adventure",
},
{item: item{id: 2, name: "x-com 2", price: 40}, genre: "strategy"},
{item: item{id: 3, name: "minecraft", price: 20}, genre: "sandbox"},
}
fmt.Printf("Inanc's game store has %d games.\n\n", len(games))
for _, g := range games {
fmt.Printf("#%d: %-15q %-20s $%d\n",
g.id, g.name, "("+g.genre+")", g.price)
}
}

33
24-structs/exercises/02-list/main.go Normal file
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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: List
//
// Now, it's time to add an interface to your program using
// the bufio.Scanner. So the users can list the games, or
// search for the games by id.
//
// 1. Scan for the input in a loop (use bufio.Scanner)
//
// 2. Print the available commands.
//
// 3. Implement the quit command: Quits from the loop.
//
// 4. Implement the list command: Lists all the games.
//
//
// EXPECTED OUTPUT
// Please run the solution and try the program with list and
// quit commands.
// ---------------------------------------------------------
func main() {
// use your solution from the previous exercise
}

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24-structs/exercises/02-list/solution/main.go Normal file
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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 (
"bufio"
"fmt"
"os"
)
func main() {
type item struct {
id int
name string
price int
}
type game struct {
item
genre string
}
games := []game{
{
item: item{id: 1, name: "god of war", price: 50},
genre: "action adventure",
},
{item: item{id: 2, name: "x-com 2", price: 40}, genre: "strategy"},
{item: item{id: 3, name: "minecraft", price: 20}, genre: "sandbox"},
}
fmt.Printf("Inanc's game store has %d games.\n", len(games))
in := bufio.NewScanner(os.Stdin)
for {
fmt.Printf(`
> list : lists all the games
> quit : quits
`)
if !in.Scan() {
break
}
fmt.Println()
switch in.Text() {
case "quit":
fmt.Println("bye!")
return
case "list":
for _, g := range games {
fmt.Printf("#%d: %-15q %-20s $%d\n",
g.id, g.name, "("+g.genre+")", g.price)
}
}
}
}

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24-structs/exercises/03-query-by-id/main.go Normal file
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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: Query By Id
//
// Add a new command: "id". So the users can query the games
// by id.
//
// 1. Before the loop, index the games by id (use a map).
//
// 2. Add the "id" command.
// When a user types: id 2
// It should print only the game with id: 2.
//
// 3. Handle the errors:
//
// id
// wrong id
//
// id HEY
// wrong id
//
// id 10
// sorry. i don't have the game
//
// id 1
// #1: "god of war" (action adventure) $50
//
// id 2
// #2: "x-com 2" (strategy) $40
//
//
// EXPECTED OUTPUT
// Please also run the solution and try the program with
// list, quit, and id commands to see it in action.
// ---------------------------------------------------------
func main() {
// use your solution from the previous exercise
}

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24-structs/exercises/03-query-by-id/solution/main.go Normal file
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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 (
"bufio"
"fmt"
"os"
"strconv"
"strings"
)
func main() {
type item struct {
id int
name string
price int
}
type game struct {
item
genre string
}
games := []game{
{
item: item{id: 1, name: "god of war", price: 50},
genre: "action adventure",
},
{item: item{id: 2, name: "x-com 2", price: 40}, genre: "strategy"},
{item: item{id: 3, name: "minecraft", price: 20}, genre: "sandbox"},
}
// index the games by id
byID := make(map[int]game)
for _, g := range games {
byID[g.id] = g
}
fmt.Printf("Inanc's game store has %d games.\n", len(games))
in := bufio.NewScanner(os.Stdin)
for {
fmt.Printf(`
> list : lists all the games
> id N : queries a game by id
> quit : quits
`)
if !in.Scan() {
break
}
fmt.Println()
cmd := strings.Fields(in.Text())
if len(cmd) == 0 {
continue
}
switch cmd[0] {
case "quit":
fmt.Println("bye!")
return
case "list":
for _, g := range games {
fmt.Printf("#%d: %-15q %-20s $%d\n",
g.id, g.name, "("+g.genre+")", g.price)
}
case "id":
if len(cmd) != 2 {
fmt.Println("wrong id")
continue
}
id, err := strconv.Atoi(cmd[1])
if err != nil {
fmt.Println("wrong id")
continue
}
g, ok := byID[id]
if !ok {
fmt.Println("sorry. i don't have the game")
continue
}
fmt.Printf("#%d: %-15q %-20s $%d\n",
g.id, g.name, "("+g.genre+")", g.price)
}
}
}

16
24-structs/exercises/README.md
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# Structs Exercises
# Struct Exercises
## Warm-Up
You'll build a queryable command-line game store.
1. **[?](https://github.com/inancgumus/learngo/tree/master/???)**
1. **[Warm Up](https://github.com/inancgumus/learngo/tree/master/24-structs/exercises/01-warmup)**
Load up the data into the game store.
2. **[List](https://github.com/inancgumus/learngo/tree/master/24-structs/exercises/02-list)**
Now, it's time to add an interface to your program using the bufio.Scanner. So the users can list the games, or search for the games by id.
3. **[Query By Id](https://github.com/inancgumus/learngo/tree/master/24-structs/exercises/03-query-by-id)**
Add a new command: "id". So the users can query the games by id.