int main() //main function
{
   printf("Hello, world!");
   /*
    * Hey, look! A multiline comment!
    * (Although the above single line comment implies
    * that this is C++ code which is nonetheless using
    * printf() instead of cout)
    */
   return 0;
}

#! /bin/bash
mv ~/Downloads/*.jpg ~/Downloads/pictures/
mv ~/Downloads/*.gif ~/Downloads/pictures/
mv ~/Downloads/*.png ~/Downloads/pictures/
mv ~/Downloads/*.bmp ~/Downloads/pictures/




(defun hello (s)
(concatenate 'string "Hello, " s)
)
(hello "me") ;demo time!