修改C/C++的默认编辑器

C++

# update-alternatives --config c++
There are 2 choices for the alternative c++ (providing /usr/bin/c++).

  Selection    Path              Priority   Status
------------------------------------------------------------
  0            /usr/bin/g++       20        auto mode
* 1            /usr/bin/clang++   10        manual mode
  2            /usr/bin/g++       20        manual mode

C

# update-alternatives --config cc
There are 2 choices for the alternative cc (providing /usr/bin/cc).

  Selection    Path            Priority   Status
------------------------------------------------------------
* 0            /usr/bin/gcc     20        auto mode
  1            /usr/bin/clang   10        manual mode
  2            /usr/bin/gcc     20        manual mode