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lines changed Original file line number Diff line number Diff line change @@ -1058,10 +1058,34 @@ int val = a[2][3]
10581058< summary> 结构类型 struct< /summary>
10591059
10601060` ` ` go
1061- type identifier struct {
1062- field1 type1
1063- field2 type2
1064- ...
1061+ package main
1062+ import " fmt"
1063+ type Vertex struct {
1064+ X int
1065+ Y int
1066+ }
1067+ func main () {
1068+ fmt.Println(Vertex{1, 2})
1069+
1070+ // 结构体字段使用点号来访问。
1071+ v := Vertex{1, 2}
1072+ v.X = 4
1073+ fmt.Println(v.X)
1074+
1075+ // 结构体字段可以通过结构体指针来访问。
1076+ e := Vertex{1, 2}
1077+ p := & e
1078+ p.X = 1e9
1079+ fmt.Println(e)
1080+
1081+
1082+ var (
1083+ v1 = Vertex{1, 2} // 类型为 Vertex
1084+ v2 = Vertex{X: 1} // Y:0 被省略
1085+ v3 = Vertex{} // X:0 和 Y:0
1086+ p = & Vertex{1, 2} // 类型为 * Vertex , 特殊的前缀 & 返回一个指向结构体的指针
1087+ )
1088+ fmt.Println(v1, p, v2, v3)
10651089}
10661090` ` `
10671091
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