some projects on ubuntu

折腾了许久，总算在ubuntu上勉强装上了HTK。然而因为年代久远，录音的驱动早已不在支持，还得解决标注的问题= =
不过至少发现了Linux的好处，非常优雅的系统～
在这个环境里还是要多多码代码，准备先用python实现一些数据结构和算法，或者直接做一些题吧。正好都放进这个git库，也方便了win与此系统文件的同步。

掏出了紫书，可能做题会更有动力吧。一道c++和python的实战。

There is an objective test result such as "OOXXOXXOOO". An'O'means a correct answer of a problem and an 'X' means a wrong answer. The score of each problem of this test is calculated by itself andits just previous consecutive 'O's only when the answer is correct. For example, the score of the 10th problem is 3 that is obtained by itself and its two previous consecutive 'O's.Therefore, the score of "OOXXOXXOOO" is 10 which is calculated by \1+2+0+0+1+0+0+1+2+3".You are to write a program calculating the scores of test results.

使用c11的 for(auto &c:line) 循环遍历形式,类似python，优雅. freopen("in","r",stdin) 可以在有cout语句的地方使用，但是无法回复到重定向前状态。

conda换源时要把默认源同时删除，不能仅仅放置在末尾。
还看了django tutorial part1

import django

django-admin startproject mysite

python manage.py runserver
#python manage.py runserver 8080

python manage.py startapp polls

#in polls/views.py
from django.http import HttpResponse

def index(request):
    return HttpResponse("Hello,it's polls index!")

#in polls/urls.py
from django.conf.urls import url

from . import views

urlpatterns=[
    url(r'^$',views.index,name='index'),
]

#in mysite/urls.py
from django.conf.urls import include,url
from django.contrib import admin

urlpatterns=[
    url(r'^polls/', include('polls.urls')),
    url(r'^admin/',admin.site.urls),
]

python manage.py runserver

In this problem, we assume that the molecular formula is represented by only four elements, 'C'(Carbon), 'H' (Hydrogen), O'(Oxygen), and 'N' (Nitrogen) without parentheses. The following table shows that the standard atomic weights for 'C', 'H', 'O', and 'N'.

Atomic Name            | Carbon      | Hydrogen    | Oxygen       | Nitrogen |
------ | ------ | ------ | ------ | ------ |
Standard Atomic Weight | 12.01 g/mol | 1.008 g/mol | 16.00 g/mol  | 14.01 g/mol |

For example, the molar mass of a molecular formula C6H5OH is 94.108 g/mol which is computed by 6 × (12.01 g/mol) + 6 × (1.008 g/mol) + 1 × (16.00 g/mol).
Given a molecular formula, write a program to compute the molar mass of the formula.

折腾了很久，因为想复习c++的语法。
使用map这种比较容易扩展的容器来存储原子表。
为了熟悉它的输入输出流，使用了 cin.get()的方法，注意它的重载形式，无参数时返回值，有参数时返回了引用。
cin.putback(c)可以放回输入流，然后直接读入数值。
cin的格式化输出真是个坑，非常麻烦，还会影响之后的语句。

cout<<setiosflags(ios::fixed)<<setprecision(3)<<1.2345<<endl;//输出"1.235" 
cout<<setiosflags(ios::scientific)<<12345.0<<endl;//输出"1.234500e+004 " 

而且我不想先读入所有的再分析，而是实时的读入一个判断一个，动态的在局部对各种状态决策，对于大规模的数据同样适用。为了便于循环处理，采用了类似于头节点的机制，先读入一个字符。

突然觉得在readme里写这些还不如直接在github上搭建个人博客。于是下载了 jekyll 结合githubpage搭建一个静态的网站，它的文档非常齐全。不过如果想要深入了解，还是需要了解它的文件头的标签语言，才能更深入的定制。

发现如果做题之前就利用“暗时间”多想想，写写画画再敲会流畅许多，回想起了初学c语言的素数判别，有些异曲同工的意味。就是没有认真读题，它竟然要求输入输出要以空行分割，套路还是深。