initial commit
parse number
study for struct
practice of struct
practice assign
learn tree
trial and error. failed. segmentation fault around p_node
can parse only one expr
delete binary
learn about pointer
refactoring
- read all file contents instead of reading one by one
- using memset instead of strcpy
can parse v0.1.0
parse multiple ops
ignore spaces
handle priority of opts
prioritize bug fix.
broken tree are made by adding parent to wrong point
can use () and handle priority
eval
bug fix
bug fix