Go語言之如何給*int32類型賦值
阿新 • • 發佈:2018-05-17
go *int32類型賦值 直接上代碼:
package main
import "fmt"
func main() {
var num *int32
var i int32 = 5
// 針對*int32的,先創建一個i類型,然後取i的地址,賦值給*int32
num = &i
fmt.Println("=====>:\t", num)
fmt.Println("=====>:\t", *num)
}
運行結果:
=====>: 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)
}
運行結果:
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
Go語言之如何給*int32類型賦值