A simple interpreter for functional programming language Scheme

Main implementations:

1. car, cdr, pair, list, lambda, let ,cond, if, call/cc, define, define-syntax and so on

2. macro with no hygiene

3. call/cc

4. garbage collector

Compile envinronment:

1. Ubuntu14.04 with clang-3.8

Reference:

1. SECD machine

2. 《Structure and Interpretation of Computer Programs》