These functions can be used in external code with OpenMaple or define_external.

MaplePrintf is the same as the printf function in the C standard library, except that it directs output to the Maple user interface instead of stdout.  The extra arguments must all be hardware types (for example, int, float, and char*).

MapleALGEB_Printf is the same as the Maple printf function.  The extra arguments must all be Maple objects (of type ALGEB). Of note in the format specification, %a, formats an object of any Maple type, whereas, for example, %d formats only Maple integers.

MapleALGEB_SPrintf is the same as the Maple sprintf function.  It returns a Maple String object containing the formatted output.

When an argument to MapleALGEB_Printf or MapleALGEB_SPrintf is an expression sequence, it is formatted as if it were a list.

$\mathrm{with}\left(\mathrm{ExternalCalling}\right)\:$

$\mathrm{dll}≔\mathrm{ExternalLibraryName}\left(''HelpExamples''\right)\:$

$\mathrm{show}≔\mathrm{DefineExternal}\left(''MyArgs''\,\mathrm{dll}\right)\:$

$\mathrm{show}\left(1\,2\right)$

External routine called with 2 arguments
arg[1] = 1
arg[2] = 2

$''1''$

$\mathrm{show}\left(x^2+1\,\left[1\,2\right]\,\mathrm{sqrt}\left(2\right)\right)$

External routine called with 3 arguments
arg[1] = x^2+1
arg[2] = [1, 2]
arg[3] = 2^(1/2)

$''x^2+1''$