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修正 05.3.md 中示例的语法错误 (#781)

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switch包含初始化语句进行条件判断时，初始化语句后应加上分号，否则会报语法错误
```
syntax error: cannot use result := calculate() as value
```

执行环境：go version go1.15.5 linux/amd64
This commit is contained in:
Cao Haowei
2020-11-22 22:18:18 +08:00
committed by GitHub
parent f8479c8188
commit 5f1c79a4f8
1 changed files with 2 additions and 2 deletions
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4
eBook/05.3.md
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@@ -144,7 +144,7 @@ switch initialization {
这种形式可以非常优雅地进行条件判断：
```go
switch result := calculate() {
switch result := calculate(); {
case result < 0:
...
case result > 0:
@@ -157,7 +157,7 @@ switch result := calculate() {
在下面这个代码片段中，变量 a 和 b 被平行初始化，然后作为判断条件：
```go
switch a, b := x[i], y[j] {
switch a, b := x[i], y[j]; {
case a < b: t = -1
case a == b: t = 0
case a > b: t = 1