流程圖的語法大體分為兩段，第一段用來定義元素，第二段用來連接元素

定義元素

tag=>type: content:>url 

tag：就是一個標(biāo)簽，在第二段連接元素時用

type：是這個標(biāo)簽的類型，從上段內(nèi)容看有6中類型，非別為：

start
end
operation
subroutine
condition
inputoutput

content：流程語句中放置的內(nèi)容

? 注意: type:與content之間一定要有一個空格，否則會出問題！

url：鏈接，與流程語句綁定

連接元素

使用->符號，如：

c2(yes)->io->e
c2(no)->op2->e

代碼塊

Markdown使用flow定義流程圖的代碼塊

測試

st=>start: Start|past:>http://blog.xiaoyulive.top
e=>end: End:>http://www.xiaoyulive.top
op1=>operation: My Operation|past
op2=>operation: Stuff|current
sub1=>subroutine: My Subroutine|invalid
cond=>condition: Yes or No?|approved:>https://github.com/quanzaiyu
c2=>condition: Good idea|rejected
io=>inputoutput: catch something...|request

st->op1(right)->cond
cond(yes, right)->c2
cond(no)->sub1(left)->op1
c2(yes)->io->e
c2(no)->op2->e

st=>start: start:>http://www.baidu.com
op1=>operation: 操作1
cond1=>condition: YES or NO?
sub=>subroutine: 子程序
e=>end

st->op1->cond1
cond1(yes)->e
cond1(no)->sub(right)->op1

st=>start: Start|past:>http://www.baidu.com
e=>end:  Ende|future:>http://www.baidu.com
op1=>operation:  My Operation
op2=>operation:  Stuff|current
sub1=>subroutine:  My Subroutine|invalid
cond=>condition:  Yes or No|approved:>http://www.google.com
c2=>condition:  Good idea|rejected
io=>inputoutput:  catch something...|future
st->op1(right)->cond
cond(yes, right)->c2
cond(no)->sub1(left)->op1
c2(yes)->io->e
c2(no)->op2->e  

st=>start: Start
i=>inputoutput: 輸入年份n
cond1=>condition: n能否被4整除？
cond2=>condition: n能否被100整除？
cond3=>condition: n能否被400整除？
o1=>inputoutput: 輸出非閏年
o2=>inputoutput: 輸出非閏年
o3=>inputoutput: 輸出閏年
o4=>inputoutput: 輸出閏年
e=>end
st->i->cond1
cond1(no)->o1->e
cond1(yes)->cond2
cond2(no)->o3->e
cond2(yes)->cond3
cond3(yes)->o2->e
cond3(no)->o4->e