https://medium.com/@Jackiesogi/c-%E8%AA%9E%E8%A8%80%E5%B7%A8%E9%9B%86-macro-%E8%B3%87%E8%A8%8A-%E4%B8%A6%E4%BD%BF%E7%94%A8bash-%E5%BB%BA%E7%AB%8B%E5%B7%A8%E9%9B%86%E6%9F%A5%E8%A9%A2%E7%A8%8B%E5%BC%8F-2bfec977fa7e
