英文:
Trying to add a struct to an array of struct (golang)
问题
要求是将一个函数中的结构体的“实例”添加到主函数中的结构体数组中。我尝试使用“append”函数，但它不能用于数组。我还尝试使用切片方法（append）和指针，但只是让我的代码变得更糟。我应该能够访问三个水果（结构体）数组中的所有元素以进行输出。谢谢！
package main
import "fmt"
type Fruit struct {
name string
color string
weight float32
}
func newFruit(name string) Fruit {
return Fruit{name: name, color: "unk", weight: 0}
}
func main() {
var basket [3]Fruit
var name string
for i := 0; i < len(basket); i++ {
fmt.Print("Enter name: ")
fmt.Scanln(&name)
basket[i] = newFruit(name)
}
for i := 0; i < len(basket); i++ {
fmt.Println("Name:", i, ":", basket[i].name)
fmt.Println("Color:", i, ":", basket[i].color)
fmt.Println("Weight:", i, ":", basket[i].weight)
}
}
英文:
The requirement is to add an "instance" of a struct from a function to be added to an array of struct in the main. I tried using "append" but it won't work on an array. I tried using slice method (append) and also pointers but it just made my code worst. I should be able to access all the elements in the array of three fruits (of structs) for output. Thanks!
package main
import "fmt"
type Fruit struct {
name string
color string
weight float32
}
func newFruit(name string) (string, string, float32) {
return name, "unk", 0
}
func main() {
var basket [3]Fruit
var name string
for i := 0; i < len(basket); i++ {
fmt.Print("Enter name: ")
fmt.Scanln(&name)
basket[i] := newFruit(name) //<-- error: assignment mismatch, tried "=" but still not working
}
for i := 0; i < len(basket); i++ {
fmt.Println("Name: ", i, ": ", basket[i].name)
fmt.Println("Color: ", i, ": ", basket[i].color)
fmt.Println("Weight: ", i, ": ", basket[i].weight)
}
}
答案1
得分: 2
你的newFruit函数需要返回一个Fruit对象，而不是两个字符串和一个float32。
例如：
func newFruit(name string) Fruit {
return Fruit{name: name, color: "unk", weight: 0}
}
正如@mkopriva在评论中指出的，你还有一个拼写错误：
basket[i] := newFruit(name) // 错误的写法
应该改为
basket[i] = newFruit(name)
英文:
Your newFruit needs to return a Fruit rather than two strings and a float32.
For example:
func newFruit(name string) Fruit {
return Fruit{name: name, color: "unk", weight: 0}
}
As @mkopriva points out in the comments, you also have a typo:
basket[i] := newFruit(name) // WRONG
should be
basket[i] = newFruit(name)
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