PFORD Bhagyashree Bohra Deepti Jindal Shringika Porwal Outline

PFORD Bhagyashree Bohra Deepti Jindal Shringika Porwal

Outline n n n Introduction Overview Examples Implementation details Lessons learned

PFORD n. A programming language for making programming easier and translates complex languages n Some Generation: C++ Java

Goals n Portability - interpreted and executed by a java interpreter. n Ease of use - very simple and quick to start

What can the language do? n Basic operations – addition, multiplication, power, modulus… n Advanced operations – complex string operations , array operations n Translation

Operations and Relations Arithmetic Operations *, /, %, /’, ‘, +, -, mod, ^ Logical Operations not and or Relational Operations >, >=, <, <=, ==, !=

Statements Block Statement {} iteration loop n runs{}; loopfrom i to f interval k{}; while(exp) loopthrough{}; = if (exp) then {}; if (exp) then {} elsedo {}; break_loop; skip_iteration; Assignments Conditional Statements Break and Continue

Functions and Function call Self Defined Functions func <id> (para-list){} Function Call id(param-list);

Internal functions (include string) • Join(a, b) joins strings a and b. • To Lower to. Lower(m) makes all the characters in a string lower case • To Upper to. Upper( m) makes all the characters in a string upper case • Mean mean() computes the mean of an array • Stddev stddev() computes the stddev of an array • Sum sum() sums all the elements of an array • Print. Array print() prints all the elements of an array • Sort sort() sorts all the elements of an array

Example 1: startprogram w = 3; x = 10; func incw() { w=w+1; return w; }; func incx() { x=x+1; return x ; } ; func myfoo(y, z) { output y+y; x = 1; output z; } ; myfoo(incw(), incx()); 8 11

What does translation entail n Multiple Walkers. (total 3 right now) – One for stand alone – On each for each language • C++ • Java

Code Statistics Parts Front-end Back-End test code (translation) Statistics (lines) 2410 Total 7650 lines (partial, currently in CVS) 4590 540

Lessons Learned 1. Fully investigate the feasibility of the supporting tools • Ie. translation 2. Get advice from experienced people 3. When an easier method of implementing classes of function exists, use it 1. power 4. When in doubt see Mx

Future 1. Additional functionality 2. Translation to more languages 1. ie perl, C#