2015年2月14日 · So to print a numeric value, it must first be converted to a string. For example: - print("product " ^ (Int.toString (43 mod 5)) ^ "\n"); product 3 val it = () : unit

2020年12月31日 · For PolyML, you can use the function PolyML.print to print values of arbitrary types (though you may need to explicitly type annotate; the type of the argument should not have any type variables). For SML/NJ, you might try taking a look at the approach discussed here https://sourceforge.net/p/smlnj/mailman/message/21897190/ , though this seems ...

2009年4月12日 · SML didn't like when I tried to pass a datatype value into print() so I probably have to create a new print function for each datatype, is that correct? You can "execute a sequence of statements, only the last of which should be treated as …

2020年12月31日 · 对于PolyML，您可以使用函数PolyML.print打印任意类型的值(尽管您可能需要显式地进行类型注释；参数的类型不应该有任何类型变量)。 对于SML/NJ，您可以尝试看看这里讨论的方法 https://sourceforge.net/p/smlnj/mailman/message/21897190/ ，尽管这似乎比它的价值更 …

SMLNJ defines the function print : string -> unit which outputs the passed string. We can use val declarations in let expressions to print out a message while we are computing some result: ... In our search example, we can use the Int.toString : int -> string function to print every element we visit while we are searching:

Tutorial using the print function in SML.fun prod(a:int,b) = (print ("Multiplying " ^ (Int.toString(a)) ^ " * " ^ (Int.toString(b)) ^ " =...

Whether to print signature bodies when they are opened. out The stream to which all compiler messages and top-level value printing should go. Initialized to TextIO.stdOut. To suppress all printout by the compiler, assign empty functions: Compiler.Control.Print.out := {say=fn _=>(), flush=fn()=>()}; linewidth

2016年4月8日 · No, there's no built-in way to print anything other than strings in SML. You either write your own utilities or break down your functions into smaller components that can be tested separately within the REPL and then you'll get automatic pretty-printing of the return value.

print in SML prints out a string. The value of print is not what is of interest, but rather the effect that it has, which is to output something on the screen. Consider the following revised version of tryGuess. In order to print we need a string so we use the built-in function Real.toString to convert to a string. More on such built-in ...

• This should get you started with SML (go and try) • Several helpful hints: 1 reading program text from file: use "file.sml"; 2 print a string on “stdout”: print "string-here\n"; 3 fix-up defaults for printing: Compiler.Control.Print.printDepth := 50; Compiler.Control.Print.printLength:= 1000; Compiler.Control.Print.stringDepth:= 200;