As Pascal is very old language, some of the features are not available as required for 3G Software like.- User Interface, Client Server Architecture etc.. And aAs C# is 3G Language, . bBetter GUI can be made easily.
2) For Better Speed./ Process Optimization
In Some applications, Pascal is more efficient and speedy than many 3G Languages.
Eg. File Manipulation Project. But Commercial Application can not be more efficient in Pascal. Application having extensive use of DATABASE can not be possible with Ppascal.
3) For Modularity :
Pascal is sequential language. It is not object oriented language. Variable declared in any Units of C# can be made available in current unit by just including that unit on the top of the file. wWhile in c# wWhole pProject is dDivided into Classes and hence wWithout an oObject wWe can not access variable declared in that class. C# have access specifier like Public, Private, Protected while fFor Pascal all variables iare s Public and can be available every where. Reusability can not be possible up to that extent ds as it is possible in c#.
What steps should be considered while using conversion software re-engg. Process ?:
1) Learning and Understanding Both Languages ( C# and Pascal )
2) Data Type Mapping for both languages.
a. Match types of Variable in Pascal with best match variable in c# ( eg . Integer in Pascal and int in c#).
b. Size of Variable.
Integer
-32768 to 32767
-2147483646 to 2147483647
3) Memory Management.
As Pointer is directly supported by Pascal., dDirect implementation of pointer is not possible in c#.. As Pascal is using stack to store all the values of variable but c# is storing all the values in stack and heap memory.
4) File Management
File manipulation of Pascal is more efficient than C#. aAs Pascal provides direct support of sequential file access and random file access (through index). In C# nNo direct namespace is available for such file management function.
Another advantage of Pascal over c# is that structure (Record) is more efficient with file manipulation. wWhile in c# Structure is just logical bifurcation of Records.
Another advantage of Pascal over c# is that it provides better searching facilities in file with the help of Indexes. wWhile nNo such provision is there in c#.
5) Value Truncation (Implicit Conversion and Explicit Conversion)
We need to considered, Value truncation at the time of using Cconversion Software of Re-Engg. Process..
Pascal to C# Journey:
(1) We have decoded all the lines of pascal code.
(2) We have prepared Algorithm and Flow Charts of Existing Pascal code.
(3) We have studied both languages and considered all Factors mentioned above.
(4) We have dDecided all general Functions , wWhich will be required in c#
(5) We have developed Code Architecture and GUI Design.
