【GO Programming Language】Pointer and Structure

Pointers and Structs

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1. Pointer concept

Pointers in Go language are easy to learn, and using pointers in Go language can perform some tasks more simply.

指针是存储另一个变量内存地址的变量
We know that a variable is a convenient placeholder for referring to a computer memory address.
The address-taking symbol of Go language is &, and if used before a variable, the memory address of the corresponding variable will be returned.

A pointer variable points to the memory address of a value

package main

import "fmt"

func main() {
    
    

	var a int = 6

	// b 是指向了 a 的内存地址， & 符号为取地址符
	var b = &a

	fmt.Println("变量a的值:", a)
	fmt.Println("变量a的内存地址值:", &a)
	fmt.Println("变量b的值:", b)

	// *指针
	fmt.Println("变量b指向的内存地址中存储的值:", *b)

	*b = 8
	fmt.Println("变量a的值:", a)

}

The memory address value of variable a: 0xc00001c0a8, the value is 6
pointer variable b, pointing to the memory address 0xc00001c0a8
pointer variable b has the address of variable a, that is, b points to a

2. The use of pointers