Optional added features to be considered and their bonus

1. 2-d array
      with run time boundary check         5%
      without run time boundary check      2.5%
2. multi-dimensional array
      with run time boundary check         10%
      without run time boundary check      5%
3. parameter passing mechanism
      call by value + call by value result 5%
      call by reference                    5%
      call by name                        25%
4. data type
      simple pointer                          5%
      simple structure                       10%
      structure with pointer/recursive def   20%
      general structure                      25%
5. block structure
      block structured statements            25%
      nested function def                    25%
6. switch/case      
7. dynamic scoping                           20%
8. optimization                  ...
9. error recovering              ...
10. function name/overloading               5%
11. vector operations            ...
12. ...