去收藏列表，如何将列表传递给函数？

Question

package main
// You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.

// Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
// Output: 7 -> 0 -> 8
import (
    "container/list"
    "fmt"
)

func main() {
    l1 := list.New()
    l1.PushBack(4)
    l1.PushBack(5)
    l1.PushBack(2)

    l2 := list.New()
    l2.PushBack(7)
    l2.PushBack(3)

    l3 := list.New()
    l3 = addTwoNumbers(l1, l2)

    for e := l3.Front(); e != nil; e = e.Next() {
        fmt.Println(e.Value)
    }
}
func addTwoNumbers(l1 list, l2 list) (l3 list) {
    int carry = 0
    l4 := list.New()
    e1 := l1.Front()
    e2 := l2.Front()
    for ;; {
        int sum = carry
        if l1 != nil {
            sum += l1.Value
            l1 = l1.Next()
        }
        if l2 != nil {
            sum += l2.Value
            l2 = l2.Next()
        }
        l4.PushBack(sum % 10)
        carry = sum / 10

        if l1== nil && l2 == nil && carry == 0{
            break
        }
    }
    return l4
}

我得到了错误:

./addTwoNumbers.go:26: syntax error: unexpected name, expecting semicolon or newline or }
./addTwoNumbers.go:31: syntax error: unexpected name, expecting semicolon or newline or }

但是我不知道怎么解决。需要帮忙。谢谢

Answer 1

您的代码中有一堆错误。

• 导入列表时，列表是模块名称而不是类型。使用 list.List
• 在 go 中，类型是在 变量名称之后。大多数时候你不需要申报
• 遍历列表时使用元素而不是列表。元素有 Value

这是一个工作版本

http://play.golang.org/p/yys-OcxZz2

package main

// You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.

// Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
// Output: 7 -> 0 -> 8
import (
    "container/list"
    "fmt"
)

func main() {
    l1 := list.New()
    l1.PushBack(4)
    l1.PushBack(5)
    l1.PushBack(2)

    l2 := list.New()
    l2.PushBack(7)
    l2.PushBack(3)

    l3 := list.New()
    l3 = addTwoNumbers(l1, l2)

    for e := l3.Front(); e != nil; e = e.Next() {
        fmt.Println(e.Value)
    }
}
func addTwoNumbers(l1 *list.List, l2 *list.List) (l3 *list.List) {
    carry := 0
    l4 := list.New()
    e1 := l1.Front()
    e2 := l2.Front()
    for {
        sum := carry
        if e1 != nil {
            sum += e1.Value.(int)
            e1 = e1.Next()
        }
        if e2 != nil {
            sum += e2.Value.(int)
            e2 = e2.Next()
        }
        l4.PushBack(sum % 10)
        carry = sum / 10

        if e1 == nil && e2 == nil && carry == 0 {
            break
        }
    }
    return l4
}