flowchart流程图

流程图的语法分为两部分

• 定义元素
• 连接元素

1、定义元素

tag=>type: content:>url

tag：标签
type：标签类型

六种标签类型
start
end
operation
subroutine   //子程序
condition
inputoutput

content：流程语句中放置的内容(type与content有一个空格)
url：链接，与流程语句绑定

2、连接元素

->
连接元素时，在标签后面可以加上(right)或者(left)来指定连线方向
需要注意，condition类型标签似乎不可以标（left）

3、示例

```mermaid
flowchat
st=>start: start
e=>end: end
io=>inputoutput: input string(len <= 20)
cond1=>condition: input unqualified?
cond2=>condition: char is lowercase?
cond3=>condition: Is last char?
op1=>operation: change to uppercase
op2=>operation: print char
op3=>subroutine: get
st->io->cond1
cond1(no)->cond2
cond1(yes, right)->e
cond2(yes)->op1->op2
cond2(no)->op2->cond3
cond3(yes)->e
cond3(no, left)->op3(left)->cond2
\```

(最后的‘\’只是为了显示出代码段标签)

Created with Raphaël 2.2.0 start input string(len <= 20) input unqualified? end char is lowercase? change to uppercase print char Is last char? get yes no yes no yes no