我有一個字符串，其中包含通過 unicode 從紅桃 A 到紅桃 10 的卡片（該練習需要使用字符串，因此沒有數組或切片）給定一個數字 n，我必須從該字符串中提取 n 張卡片。如果使用 for-range 我得到的位數比我需要的少，我該怎么做？package mainimport ( "fmt" "math/rand" "strconv" "strings" "time")func main() { var n int var deck string rand.Seed(int64(time.Now().Nanosecond())) n = readNumber() deck = deckGenerator() drawCards(deck, n)}func readNumber() (n int) { for n <= 0 || n >= 10 { fmt.Print("Enter number between 1 and 9: ") fmt.Scan(&n) } return n}func deckGenerator() (deck string) { for i := 0; i < 10; i++ { deck += strconv.Itoa('\U0001F0B1' + i) } return deck}func drawCards(deck string, n int) { for i := 0; i < n; i++ { cardPulledOut, deck2 := drawCard(deck) fmt.Println("Pulled out the card", cardPulledOut, "- Cards left in the deck:", deck2) }}func drawCard(deck string) (cardPulledOut rune, deck2 string) { for true { card := rune(('\U0001F0B1') + rand.Intn(10)) //random number between 0 and 9 inclusive for _, v := range deck { fmt.Println(v, card) /* output: (infinity loop) ... 49 127156 53 127156 56 127156 ... */ if v == card { deck = strings.Replace(deck, string(card), "", 1) return cardPulledOut, deck2 } } } return}
2 回答
冉冉說
TA貢獻1877條經驗 獲得超1個贊
您的人口函數有一個錯誤：
func deckGenerator() (deck string) {
for i := 0; i < 10; i++ {
// deck += strconv.Itoa('\U0001F0B1' + i) // converts integers to their string equivalent e.g. "127156"
deck += string(rune('\U0001F0B1' + i)) // fix
}
return deck
}
https://go.dev/play/p/E3sVRZK4exh
嗶嗶one
TA貢獻1854條經驗 獲得超8個贊
需要的人的正確代碼：
package main
import (
"fmt"
"math/rand"
"strings"
"time"
)
func main() {
var n int
var deck string
rand.Seed(int64(time.Now().Nanosecond()))
n = readNumber()
deck = deckGenerator()
drawCards(deck, n)
}
func readNumber() (n int) {
for n <= 0 || n >= 10 {
fmt.Print("Enter number between 1 and 9: ")
fmt.Scan(&n)
}
return n
}
func deckGenerator() (deck string) {
for i := 0; i < 10; i++ {
//deck += strconv.Itoa('\U0001F0B1' + i)
deck += string(rune('\U0001F0B1' + i))
}
return deck
}
func drawCards(deck string, n int) {
var cardPulledOut rune
for i := 0; i < n; i++ {
cardPulledOut, deck = drawCard(deck)
fmt.Println("Pulled out the card", string(rune(cardPulledOut)), "- Cards left in the deck:", deck)
}
}
func drawCard(deck string) (card rune, deck2 string) {
for true {
card = rune(('\U0001F0B1') + rand.Intn(10)) //random number between 0 and 9 inclusive
for _, v := range deck {
//fmt.Println(v, card)
if v == card {
deck2 = strings.Replace(deck, string(card), "", 1)
return card, deck2
}
}
}
return
}
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