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Golang pointer
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| package main | |
| import "fmt" | |
| type person struct { | |
| name string | |
| } | |
| func main() { | |
| p := person{"Richard"} | |
| fmt.Printf("Before rename,address: %p\n", &p) | |
| fmt.Printf("Before renam, p value: %s\n", p) | |
| rename(&p) | |
| fmt.Printf("After rename, address of p: %p\n", &p) | |
| fmt.Printf("After rename, address of p: %s\n", p) | |
| } | |
| func rename(p *person) { // 使用 pointer, 可以想成綁住 "指定位置" 的person variable | |
| p.name = "test" | |
| fmt.Printf("Within rename, p value, %s\n", p) | |
| fmt.Printf("Within rename, address of p, %p\n", p) // 不要使用 &p , 因為此時 p 已經是 pointer , 直接印出地址, 使用 &p ,會變成 pointer of pointer | |
| } |
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