[C/C++] efficient convenient IDE for C and C++

1. Dev-C++  (formerly known as Bloodshed Dev-C++)
TDM-GCC version works great.
        https://sourceforge.net/projects/orwelldevcpp/
        http://orwelldevcpp.blogspot.com.au/


2. Code::Blocks
MinGW version works great. (It includes GCC compiler and GDB debugger from TDM-GCC.)
        https://sourceforge.net/projects/codeblocks/
        http://www.codeblocks.org/

Text Editor - NotePad++

A very nice text editor program which is free of charge.... NotePad++
http://notepad-plus-plus.org/
A similar program is Acroedit:  http://www.acrosoft.pe.kr/board/ae_intro

HTML or webpage editor :  http://www.kompozer.net/



Tips:

1. vertical block
Pressing Shift + Alt, drag what to be blocked using key-cursor or mouse.

2. when Korean characters are not properly visible,
Setting --> Style configurator
        Language -->  Global Style,   Style --> Global override
        Font Style  -->  Korean font (e.g., 바탕체)
        Check at "Enable global font"