type W struct {
b byte
i int32
j int64}type W2 struct {
name string
age int32}var w Wvar w2 W2
fmt.Println(unsafe.Sizeof(w), unsafe.Sizeof(w2))對(duì)于w變量我知道內(nèi)存占用應(yīng)該是16，但是w2為啥是24呢？求賜教
1 回答
汪汪一只貓
TA貢獻(xiàn)1898條經(jīng)驗(yàn) 獲得超8個(gè)贊
import "fmt"import "unsafe"func main() { var bs []byte
fmt.Println("[]byte:", unsafe.Sizeof(bs)) var str string
fmt.Println("string:", unsafe.Sizeof(str)) var i64 int64
fmt.Println("int64:", unsafe.Sizeof(i64)) var i32 int64
fmt.Println("int32:", unsafe.Sizeof(i32)) var stru struct{}
fmt.Println("struct:", unsafe.Sizeof(stru))
}文檔上這么寫(xiě)的
Sizeof takes an expression x of any type and returns the size in bytes of a hypothetical variable v as if v was declared via var v = x. The size does not include any memory possibly referenced by x. For instance, if x is a slice, Sizeof returns the size of the slice descriptor, not the size of the memory referenced by the slice.添加回答
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