配置Clion

        安装gcc、g++、make
        Ubuntu中用到的编译工具是gcc©，g++（C++），make(连接)。因此只需安装对应的工具包即可。Ubuntu下使用命令安装这些包：
（1）安装gcc

sudo apt install gcc

（2）安装g++

sudo apt install g++

（3）安装make

sudo apt install make

附录

[0/1] Re-running CMake...
-- Found glog (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libglog.so)
-- Configuring done -- Generating done -- Build files have been written to: /home/fairlee/CLionProjects/hw_day4/cmake-build-debug ninja: error: manifest 'build.ninja' still dirty after 100 tries

尽量不使用ninja编译工具，采用cmake编译工具。