func和init示例

bilibili/src/func/test.go

@@ -0,0 +1,60 @@
+package main
+
+import "fmt"
+
+func foo1(a string, b int) int {
+	fmt.Println("a = ", a)
+	fmt.Println("b = ", b)
+
+	c := 100
+
+	return c
+}
+
+func foo2(a string, b int) (int, int) {
+	fmt.Println("a = ", a)
+	fmt.Println("b = ", b)
+
+	return 666, 777
+}
+
+func foo3(a string, b int) (r1 int, r2 int) {
+	fmt.Println("---- foo3 ----")
+	fmt.Println("a = ", a)
+	fmt.Println("b = ", b)
+
+	fmt.Println("r1 = ", r1)
+	fmt.Println("r2 = ", r2)
+
+	// 给有名称的返回值变量赋值
+	r1 = 1000
+	r2 = 2000
+
+	return
+}
+
+func foo4(a string, b int) (r1, r2 int) {
+	fmt.Println("---- foo4 ----")
+	fmt.Println("a = ", a)
+	fmt.Println("b = ", b)
+
+	// 给有名称的返回值变量赋值
+	r1 = 1000
+	r2 = 2000
+
+	return
+}
+
+func main() {
+	c := foo1("abc", 555)
+	fmt.Println("c = ", c)
+
+	ret1, ret2 := foo2("haha", 999)
+	fmt.Println("ret1 = ", ret1, ", ret2 = ", ret2)
+
+	re1, re2 := foo3("foo3", 333)
+	fmt.Println("re1 = ", re1, ", re2 = ", re2)
+
+	res1, res2 := foo4("foo4", 333)
+	fmt.Println("res1 = ", res1, ", res2 = ", res2)
+}

bilibili/src/init/go.mod

@@ -0,0 +1,3 @@
+module init
+
+go 1.23

bilibili/src/init/lib1/lib1.go

@@ -0,0 +1,12 @@
+package lib1
+
+import "fmt"
+
+// 当前lib1包提供的API
+func Lib1Test() {
+	fmt.Println("Lib1Test.")
+}
+
+func init() {
+	fmt.Println("lib1. init() ...")
+}

bilibili/src/init/lib2/lib2.go

@@ -0,0 +1,12 @@
+package lib2
+
+import "fmt"
+
+// 当前lib2包提供的API
+func Lib2Test() {
+	fmt.Println("Lib2Test.")
+}
+
+func init() {
+	fmt.Println("lib2. init() ...")
+}

bilibili/src/init/main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"init/lib1"
+	"init/lib2"
+)
+
+func main() {
+	lib1.Lib1Test()
+	lib2.Lib2Test()
+}