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脱C++・反CPP
今、選挙がアツい
第47回衆議院議員総選挙 
12月14日施行 
ロボット技術研究会重役選挙 
1月施行予定
脱C++・反CPP
C++は 
なんでもできる
C++は 
なんでもできる 
できなければならない
Bjarne Stroustrup 
“The C++ Source A Brief Look at C++0x” 
January 2, 2006. 
Some people object: “Don‘t dumb-down C++ for novices—there are 
languages enough for those”, or “The sooner novices become experts the 
better!” These people have a point, but there will always be more novices 
than experts. Many C++ users quite reasonably don’t want to become C++ 
experts—they are experts in their own fields (e.g., physicists, graphics 
specialists, or hardware engineers) who use C++. In my opinion, C++ has 
become too “expert friendly” and it will cost us little to provide much better 
support for “novices”. It will cost us nothing in terms of performance (the 
zero-overhead principle still holds), in flexibility (we don‘t propose to prohibit 
anything), or in terseness of code. On the contrary, we aim to simplify 
expression of ideas. Finally, C++ is so large, is used in so many application 
areas, and there are so many useful C++ design techniques, that we are all 
“novices” much of the time. 
URL:http://www.artima.com/cppsource/cpp0x.html
脱C++・反CPP
そこで 
Fortran
最大与党 
C++ 
からの政権交代
最高のFortran 
• 計算が速い 
• 資源が多い 
URL:http://fortranwiki.org/fortran/show/Libraries
最高のFortran 
• ポインタは? 
• 構造体は? 
• クラス化は? 
• カプセル化は? 
• 演算子の定義は? 
• 演算子や関数多重定義は? 
• 再帰呼び出しは? 
全部ある
脱C++・反CPP
ここがダメだよFortran 
GUIがツライ
そこで 
Python
FortranとPythonの超党派 
計算処理GUI 
Fortran Python 
f2py
サンプル 
HappyLatticeDensityGenerator 
結晶の密度を計算する 
アプリケーション
サンプルの中身 
密度計算GUI 
Fortran PySide 
QtDesigner 
f2py
脱C++・反CPP
まとめ 
言いたかったこと 
• あるものは使おう 
• Fortranで科学計算をしよう 
• 得意分野で苦手分野を補おう 
ちょっと待て 
でもC++はいいヤツだよ

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普段C++を使っているロボット技術研究会のみんなにFortranを勧めてみた