From: Ace <acezhao@tencent.com>
Date: Fri, 13 Nov 2015 07:31:25 +0000 (+0800)
Subject: go...
X-Git-Url: http://zhaoyanbai.com/repos/nslookup.html?a=commitdiff_plain;h=c9c1394843c0d00830357e47d92f0f0ae8eb4a0e;p=acecode.git

go...
---

diff --git a/learn/go/hello/hello.go b/learn/go/hello/hello.go
index 6e6f83d..61438ad 100644
--- a/learn/go/hello/hello.go
+++ b/learn/go/hello/hello.go
@@ -5,11 +5,18 @@ import "math/rand"
 import "time"
 
 func GetStr() (string, string) {
+    // 常量可以是数字、字符串、布尔或字符
 	const stra = "Hello"
 	const strb string = "World"
 	return stra, strb
 }
 
+// 多常量
+const (
+    BigInt  = 1 << 9
+    ConstStr= "HELLO WORLD"
+)
+
 func PrintType() {
 	var a int
 	var b int32
@@ -23,6 +30,35 @@ func PrintType() {
 	fmt.Printf("%T %T %T %T %T %T %T %T\n", a, b, c, d, e, f, g, h)
 }
 
+
+func Add(a int, b int) int {
+    return a+b
+}
+
+
+// 当两个或多个连续参数是同一类型，除了最后一个类型之外，其它的都可以省略
+func SwapString(a, b string) (string, string) {
+    return b, a
+}
+
+
+// 返回值可以被命名
+func Split(sum int) (a, b int) {
+    a = sum * 4 / 9
+    b = sum - a
+    return
+}
+
+
+// 定义变量
+var va, vb, vc string
+
+// 定义变量+初始化
+var ia, ib, ic rune = 1, 0xFAD, 434
+var fa float64 = 2.71828182846
+var xa, xb, xc = true, "xb", 0xDD
+
+
 func main() {
 	defer fmt.Println("----------------")
 	rand.Seed(time.Now().UnixNano())
@@ -31,4 +67,38 @@ func main() {
 	}
 
 	PrintType()
+
+    fmt.Println(Add(3, 543))
+
+    fmt.Println(SwapString("Hello", "World"))
+
+    fmt.Println(Split(342))
+
+
+    va = "va"
+    vb = "vb"
+    vc = "vc"
+    fmt.Println(va, vb, vc)
+
+    fmt.Println(ia, ib, ic)
+
+    fmt.Println(fa)
+
+    fmt.Println(xa, xb, xc)
+
+
+    // 短声明,只能用在函数内部
+    sa := 34
+    // 类型推导
+    sb := sa
+    fmt.Println(sa, sb)
+
+    // 强制类型转换
+    sc := float64(sa)
+    fmt.Println(sc)
+
+    // 常量不能用:=语法定义
+    // const sd := sa
+
+    fmt.Println(BigInt, ConstStr)
 }