作为戈朗结构中的场
原文:https://www . geesforgeks . org/function-as-a-field-in-golang-structure/
Golang 中的一个结构或 struct 是用户自定义的类型，它允许我们将一组不同类型的元素创建成一个单元。任何具有一组属性或字段的现实实体都可以表示为一个结构。我们知道，在 Go 语言中函数也是用户定义的类型，因此，您可以在 Go 结构中创建一个函数字段。您也可以使用匿名函数在 Go 结构中创建一个函数字段，如示例 2 所示。
语法:
type function_name func()
type strcut_name struct{
var_name function_name
}
让我们借助例子来讨论这个概念:
例 1:
// Go program to illustrate the function
// as a field in Go structure
package main
import "fmt"
// Finalsalary of function type
type Finalsalary func(int, int) int
// Creating structure
type Author struct {
name string
language string
Marticles int
Pay int
// Function as a field
salary Finalsalary
}
// Main method
func main() {
// Initializing the fields
// of the structure
result := Author{
name: "Sonia",
language: "Java",
Marticles: 120,
Pay: 500,
salary: func(Ma int, pay int) int {
return Ma * pay
},
}
// Display values
fmt.Println("Author's Name: ", result.name)
fmt.Println("Language: ", result.language)
fmt.Println("Total number of articles published in May: ", result.Marticles)
fmt.Println("Per article pay: ", result.Pay)
fmt.Println("Total salary: ", result.salary(result.Marticles, result.Pay))
}
输出:
Author's Name: Sonia
Language: Java
Total number of articles published in May: 120
Per article pay: 500
Total salary: 60000
例 2:
// Go program to illustrate the function
// as a field in Go structure
// Using anonymous function
package main
import "fmt"
// Creating structure
type Author struct {
name string
language string
Tarticles int
Particles int
Pending func(int, int) int
}
// Main method
func main() {
// Initializing the fields
// of the structure
result := Author{
name: "Sonia",
language: "Java",
Tarticles: 340,
Particles: 259,
Pending: func(Ta int, Pa int) int {
return Ta - Pa
},
}
// Display values
fmt.Println("Author's Name: ", result.name)
fmt.Println("Language: ", result.language)
fmt.Println("Total number of articles: ", result.Tarticles)
fmt.Println("Total number of published articles: ",
result.Particles)
fmt.Println("Pending articles: ", result.Pending(result.Tarticles,
result.Particles))
}
输出:
Author's Name: Sonia
Language: Java
Total number of articles: 340
Total number of published articles: 259
Pending articles: 81
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