[PATCH v2] Calc: Add a simple implementation.

[Hua Meng]

Signed-off-by: Hua Meng <161220092(a)smail.nju.edu.cn>
---
  configure                 |   2 +
  configure.ac              |   1 +
  programs/calc/Makefile.in |   8 ++
  programs/calc/calc.rc     |  34 +++++
  programs/calc/main.c      | 318 
++++++++++++++++++++++++++++++++++++++++++++++
  programs/calc/resource.h  |  42 ++++++
  6 files changed, 405 insertions(+)
  create mode 100644 programs/calc/Makefile.in
  create mode 100755 programs/calc/calc.rc
  create mode 100644 programs/calc/main.c
  create mode 100755 programs/calc/resource.h