比较戈朗的指针
原文:https://www.geeksforgeeks.org/comparing-pointers-in-golang/
指针在 Go 编程语言或 Golang 中是一个变量，用来存储另一个变量的内存地址。Golang 中的指针也被称为特殊变量。变量用于在系统的特定内存地址存储一些数据。内存地址总是以十六进制格式出现(从 0x 开始，如 0xFFAAF 等)。). 在围棋语言中，你可以比较两个指针。两个指针值只有在指向内存中的相同值或为零时才相等。您可以借助 == 和对指针进行比较！=Go 语言提供的运算符:
1。==运算符:如果两个指针都指向同一个变量，则该运算符返回 true。或者如果两个指针都指向不同的变量，则返回 false。
语法:
pointer_1 == pointer_2
示例:
// Go program to illustrate the
// concept of comparing two pointers
package main
import "fmt"
func main() {
val1 := 2345
val2 := 567
// Creating and initializing pointers
var p1 *int
p1 = &val1
p2 := &val2
p3 := &val1
// Comparing pointers
// with each other
// Using == operator
res1 := &p1 == &p2
fmt.Println("Is p1 pointer is equal to p2 pointer: ", res1)
res2 := p1 == p2
fmt.Println("Is p1 pointer is equal to p2 pointer: ", res2)
res3 := p1 == p3
fmt.Println("Is p1 pointer is equal to p3 pointer: ", res3)
res4 := p2 == p3
fmt.Println("Is p2 pointer is equal to p3 pointer: ", res4)
res5 := &p3 == &p1
fmt.Println("Is p3 pointer is equal to p1 pointer: ", res5)
}
输出:
Is p1 pointer is equal to p2 pointer: false
Is p1 pointer is equal to p2 pointer: false
Is p1 pointer is equal to p3 pointer: true
Is p2 pointer is equal to p3 pointer: false
Is p3 pointer is equal to p1 pointer: false
2。！=运算符:如果两个指针都指向同一个变量，则该运算符返回 false。或者如果两个指针都指向不同的变量，则返回 true。
语法:
pointer_1 != pointer_2
示例:
// Go program to illustrate the
// concept of comparing two pointers
package main
import "fmt"
func main() {
val1 := 2345
val2 := 567
// Creating and initializing pointers
var p1 *int
p1 = &val1
p2 := &val2
p3 := &val1
// Comparing pointers
// with each other
// Using != operator
res1 := &p1 != &p2
fmt.Println("Is p1 pointer not equal to p2 pointer: ", res1)
res2 := p1 != p2
fmt.Println("Is p1 pointer not equal to p2 pointer: ", res2)
res3 := p1 != p3
fmt.Println("Is p1 pointer not equal to p3 pointer: ", res3)
res4 := p2 != p3
fmt.Println("Is p2 pointer not equal to p3 pointer: ", res4)
res5 := &p3 != &p1
fmt.Println("Is p3 pointer not equal to p1 pointer: ", res5)
}
输出:
Is p1 pointer not equal to p2 pointer: true
Is p1 pointer not equal to p2 pointer: true
Is p1 pointer not equal to p3 pointer: false
Is p2 pointer not equal to p3 pointer: true
Is p3 pointer not equal to p1 pointer: true
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