Search results
Results from the WOW.Com Content Network
The Metacode extension to C++ (Vandevoorde 2003) [1] was an early experimental system to allow compile-time function evaluation (CTFE) and code injection as an improved syntax for C++ template metaprogramming. In earlier versions of C++, template metaprogramming is often used to compute values at compile time, such as:
Finding minimum entropy codes. Neural Computation, 1:412-423, 1989. Jürgen Schmidhuber. Learning factorial codes by predictability minimization. Neural Computation, 4(6):863-879, 1992; J. Schmidhuber and M. Eldracher and B. Foltin. Semilinear predictability minimization produces well-known feature detectors. Neural Computation, 8(4):773-786, 1996
The code above will execute at run time to determine the factorial value of the literals 0 and 4. By using template metaprogramming and template specialization to provide the ending condition for the recursion, the factorials used in the program—ignoring any factorial not used—can be calculated at compile time by this code:
Download QR code; Print/export Download as PDF; ... and the Boost C++ ... (n = 0) return 1 return n * factorial(n − 1) Other methods suitable for its computation ...
factorial := 1 counter := 1 while counter < 5 counter := counter + 1 factorial := factorial * counter print counter + "! equals " + factorial As demonstrated by the output of the variables. Timeline of the for-loop syntax in various programming languages
function factorial (n is a non-negative integer) if n is 0 then return 1 [by the convention that 0! = 1] else if n is in lookup-table then return lookup-table-value-for-n else let x = factorial(n – 1) times n [recursively invoke factorial with the parameter 1 less than n] store x in lookup-table in the n th slot [remember the result of n! for ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
call factorial (4) call fact-iter (1 4) replace arguments with (4 3) replace arguments with (12 2) replace arguments with (24 1) return 24 return 24 This reorganization saves space because no state except for the calling function's address needs to be saved, either on the stack or on the heap, and the call stack frame for fact-iter is reused ...