But the limit is 10 uppercase letters, including theta, but not recursive n or finance vars. Floats won't be added, not in this version, and probably not in the future. Floats won't be added, not in this version, and probably not in the future. As floats go, what makes them so difficult to implement? Is it that they are too slow, or they would require rewriting every other function, or something else? 
The Future Is Now
sum(0) - CloseAll - closes all the opened slots
sum(1,"NAME","MODE") - Open - opens an appvar, check below for the mode. Returns a slot number
sum(2,"NAME","MODE",VAR_TYPE) - OpenVar - opens a variable, check below for the mode and VAR_TYPE. Return a slot number.
sum(3,SLOT) - Close - closes a slot
sum(4,"DATA",SIZE,COUNT,SLOT) - Write - writes COUNT*SIZE bytes of DATA to the variable in SLOT. SIZE = 1, 2, 3
sum(5,"DATA",SIZE,COUNT,SLOT) - Read - reads COUNT*SIZE bytes from the variable in slot SLOT, and stores it to DATA. SIZE = 1, 2, 3
sum(6,SLOT) - GetChar - gets a one byte character from the variable in slot SLOT. Returns EOF (-1)
if out of range
sum(7,CHAR,SLOT) - PutChar - writes a char to the variable in slot SLOT
sum(8,"NAME") - Delete - deletes an appvar
sum(9,"NAME",VAR_TYPE) - DeleteVar - deletes a variable. Check below for the variable types
sum(10,OFFSET,ORIGIN,SLOT) - Seek - seeks to an offset, ORIGIN = 1 (seek from beginning of file),
2 (seek from current offset in file), 3 (seek from end of file)
sum(11,SIZE,SLOT) - Resize - resizes variable in slot SLOT to SIZE bytes.
sum(12,SLOT) - IsArchived - Returns 0 if variable in slot SLOT is in RAM, 1 if in Archive.
sum(13,ARCHIVED,SLOT) - SetArchiveStatus - sends variable in slot SLOT to RAM if ARCHIVED =
0, to Archive if ARCHIVED = 1
sum(14,SLOT) - Tell - gets the current offset of SLOT
sum(15,SLOT) - Rewind - seeks to the beginning of the variable in slot SLOT
sum(16,SLOT) - GetSize - gets the size of the variable in slot SLOT
Copy(DEST,SRC,SIZE) - Copies SIZE bytes from SRC to DEST
Copy(XXXX,DEST,SRC,SIE) - Copies SIZE bytes from SRC to DEST backwards. The first argument can be anything
Alloc( - Allocates free memory for storing sprites. Returns a pointer to the memory.
DefineSprite(W,H) - Defines an empty sprite in the free memory, useful for storing the rotated sprite.
Returns a pointer to the memory.
DefineSprite(W,H,"DATA") - Defines a sprite in the program data, returns a pointer to the start of the sprite
sin(
cos(
String concatenation and storing, substrings, lengthProgram - 5
Protected program - 6
Appvar - 21
DefineSprite(X,X,"DATA")->A
DefineSprite(X,X)->B
Sprite_NoClip(A,10,10)
RotateSpriteC(A,B)
Sprite_NoClip(B,20,20)
The Future Is Now
Also, I figured out some functions doesn't work yet, since C strings are different from BASIC strings. i.e. for opening a file, there is a mode, which is like "w", "r+", or "a" or so, but I *think* that doesn't work yet (I might be incorrect though), so you might look up the ASCII value of these characters, and put the corresponding BASIC token in the string. I hope to fix that asap.
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