直接上代码:
- package main
- import “fmt”
- func main () {
- var num *int32
- var i int32 = 5
- // 针对int32的，先创建一个i类型，然后取i的地址，赋值给int32
- num = &i
- fmt.Println(“=====>:\t”, num)
- fmt.Println(“=====>:\t”, *num)
- }
运行结果：
- =====>: 0xc042064080
- =====>: 5
- Process finished with exit code 0
下面的形式是不可以的：
- package main
- import “fmt”
- func main () {
- var num *int32
- *num = 5
- fmt.Println(“=====>:\t”, num)
- fmt.Println(“=====>:\t”, *num)
- }
运行结果：
- panic: runtime error: invalid memory address or nil pointer dereference
- [signal 0xc0000005 code=0x1 addr=0x0 pc=0x48b4ea]
- goroutine 1 [running]:
- main.main()
- E:/Program/go2/goPath/src/xingej-go/xingej-go/xingej-go666/string/test.go:7 +0x2a
- Process finished with exit code 2
原因？
可能是取不到常量5的地址
转载于:https://blog.51cto.com/xingej/2117313
Original: https://www.cnblogs.com/twoheads/p/12960961.html
Author: twoheads
Title: Go语言之如何给*int32类型赋值
原创文章受到原创版权保护。转载请注明出处：https://www.johngo689.com/535796/
转载文章受原作者版权保护。转载请注明原作者出处！