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这是我写的数据连接代码。$ m4 B4 X' }, ?
//---------------------------------------------------------------------------
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#include <vcl.h>. B+ _" N# x6 r' y* ^
#pragma hdrstop* D) u& D! S; J2 i" n
* ?5 z8 _" C0 C1 M; l% y
#include "Unit1.h"
( @ `8 V9 w; Z#include "Stdlib.h"
5 T- z+ k: E7 Q' m. a. ~#include "Stdio.h". `1 H. Y4 k0 t, g* A- O& v1 u/ x
#include "mathlink.h"
; ^' q. @8 V' i1 }( ~) H/ U' J#include "String.h"
' x7 p' S* P* r+ k; j2 Ystatic int read_and_print_expression( MLINK lp);
8 t4 Q0 t" u% @; `1 _4 [& b/ Ostatic int read_and_print_atom( MLINK lp, int tag);0 B/ t) k; n6 g9 w3 e! H# F
static int read_and_print_function( MLINK lp);3 v; ^5 X- y/ f o7 f+ I( L* ~8 a
//---------------------------------------------------------------------------
; @, U. K& c z+ t( Y" W, I4 C ~ T2 j. E#pragma package(smart_init)
2 w* s1 M4 D+ c; M- L#pragma link "RzEdit"( k1 V; p( o6 {
#pragma resource "*.dfm". Y" B- p! g3 Y. K* g
TForm1 *Form1;! T4 D* e6 |/ E& Q8 m
+ d7 D8 s+ J- X$ }
int sum;
* s. s- G; O+ w! Q; idouble tmpbackreal;! T/ l- O: o; G. G# {' t
MLEnvironment env;( J/ E' U* \. E3 k3 C3 c. e' \# f
MLINK lp;
1 r9 ]$ j1 M y5 y ?int argc = 4;6 h9 _$ [3 j3 x( M& ^
char *argv[5] = {"-linkname",! u; r5 J) M2 J7 U" c: Z6 ?0 b4 w
"D:\\Program Files\\Mathematica\\9.0\\mathkernel -mathlink",
' W. f+ V9 z! y+ T; a- z: ~3 B "-linkmode",
) H: L7 V- R! I8 S. T/ b "launch",
8 o k, t3 F5 v" B NULL};4 W% Z. |/ G. t! W/ h# Z+ B
$ Q; D- o' @( `" C6 X! D0 l//---------------------------------------------------------------------------
' U7 F& Q# @( S G__fastcall TForm1::TForm1(TComponent* Owner)
! S& B: }: b2 u : TForm(Owner)+ c' s# z$ |7 m
{
* y& }* |" o; q( Z$ i}
5 s- h/ M, m8 o//---------------------------------------------------------------------------
1 `1 h- I$ t2 K4 O+ ?4 Avoid __fastcall TForm1::Button1Click(TObject *Sender)' s% G8 m+ u% e; h5 P& M
{
* f$ S4 C2 ~! \$ k const CHAR *pOutputString;' W, A& p- G- ~
MLPutFunction(lp, "EvaluatePacket", 1);+ {# q. \' ~& \7 |; S; p
MLPutFunction(lp, "ToExpression", 1);
2 D# w& N2 z2 z8 u/ R MLPutString(lp, AnsiString(Edit1->Text).c_str());
6 t; T4 `" ~$ s/ O, s MLEndPacket(lp);
" `7 w0 X* A4 k o5 p2 a while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
8 q4 ?) z# p. K6 |) w% N read_and_print_expression(lp);- X B! b" |! T) F) o2 ]
}. _! f$ [$ T" k! O8 ~5 Z4 q; Y
//---------------------------------------------------------------------------
' f6 m# G Z4 `* }: |void __fastcall TForm1::FormCreate(TObject *Sender)- f6 x, S) O% x2 ~1 ?
{3 c- M% c& j* y; L$ Z2 f
Edit1->Text = "Power[2,5]";5 y' D6 R5 W2 e. @" t9 S: K
env = MLInitialize(NULL); if(env == NULL) Edit2->Text = "出错env" ;% l% [' d! ~- j4 c) I1 \
lp = MLOpen(argc, argv); if(lp == NULL) Edit2->Text = "出错lp" ;% P t6 [# n& b |. f
}
! ~2 r1 B! U' |' N, n8 l//---------------------------------------------------------------------------) ~/ [0 T* J& }) z# A& _
! a% T% s: {6 M7 B( X* Y [void __fastcall TForm1::Button2Click(TObject *Sender)
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MLClose(lp);; b" V5 `5 g* z8 X1 G
MLDeinitialize(env);
9 ?3 Q! i: ^$ Y3 v K$ G9 l* l8 }! _}" @! e( M% h! a# J% B0 k
//---------------------------------------------------------------------------. y7 \% m7 I+ Q
static int read_and_print_expression( MLINK lp)
# K8 r! b9 T- q5 s; e{
+ g' b. y$ O$ j C* I0 j int tag;* J5 u/ j; E1 v( e" C2 N5 `- O& F' M
! R' k7 e# E5 a. T( R switch (tag = MLGetNext( lp)) {/ D q" } q0 Z2 B# q
case MLTKSYM:0 @! \6 M0 L# {$ s5 U9 {
case MLTKSTR:: z5 \# I+ Z6 |& Q
case MLTKINT:
) G( [, E% A7 x- R( d6 W3 [ Form1->RzNumericEdit1->Text = tag;) W- Z( B S2 q& g: Q
Form1->Label1->Caption = Form1->RzNumericEdit1->Text;
7 m/ n( g k" e5 Z3 S6 z& N, y return read_and_print_atom( lp, tag);
9 ?1 N( c' s6 |7 _ case MLTKREAL:2 T$ }4 f# ?3 l q* {# _! L
Form1->RzNumericEdit1->Text = tag;
% ]! b1 x' Z; }- B6 \ Form1->Label1->Caption = Form1->RzNumericEdit1->Text;5 ^3 N- ]2 ?7 I) u9 T! Z# ]) D
return read_and_print_atom( lp, tag);
$ W3 n# q! R4 @! V; R: x case MLTKFUNC:
% U. N6 r* }$ u5 M5 L) g return (read_and_print_function( lp));
$ z. {! z- H; Q, Q7 d case MLTKERROR:# E' P* w' v1 D& O+ |
//case MLTKGRAF; M! C; ]& s6 \
default:/ W( r" M7 v% p" G% \
return 0;
& Q& E' h! a) T4 C6 V }
9 d& @. E5 {. F! \/ P/ J% d
! b& }8 W7 N4 ?! W. f7 |" h}
: i& C6 a! D: t' Y W7 E; ~8 l( g; H# ^, J) `5 q- ^4 m- K3 k4 Z- h( {
static int read_and_print_function( MLINK lp)7 ]* A; Z# u+ T) T5 z
{1 Q! s$ W( Q j6 z
int len, i;8 r/ o$ ^7 Z: n$ F( G- y, g2 s; w
static int indent;+ w, ]% i3 c' \; R. R
: S6 P% w, C2 n; W) z+ W
if( ! MLGetArgCount( lp, &len)) return 0;
0 [ M6 L- H7 Y# u A' y5 H4 m3 s, M7 U4 {4 Q
indent += 3;5 _$ b: U" i2 W+ |4 B$ a9 [; `
printf( "\n%*.*s", indent, indent, "");
3 s8 P& o! N& |. g0 r& K( c: K+ N& e) q0 E% U, T* w1 o
if( read_and_print_expression( lp) == 0) return 0;7 M4 ]3 R& R2 `' o" ^/ r) B
printf( "[");
3 T9 Z7 ^, C2 a# _) y* o! ]
1 E9 i/ Z# a( B# b$ S for( i = 1; i <= len; ++i) {
/ a4 g3 ~% C$ L# [0 L& J) h" h if( read_and_print_expression( lp) == 0) return 0;
$ x9 V# `/ y( Z0 e5 `! D% i if( i < len) printf( ", ");
# ^: w: X" W, D% F* _/ i }
9 t' T1 z# x3 b. l2 N9 v4 Y$ k# k4 ? printf( "]");
/ y$ W& C8 j* O4 X2 f2 k( u+ N) F indent -= 3;' B5 e6 v1 Y/ O, g. g! T6 m. r
6 L- l5 \; _' M
return 1;
/ c4 c% B1 y1 U# ?; |}9 E. n% ]" z5 B8 M
8 g j7 c& y! M Fstatic int read_and_print_atom( MLINK lp, int tag) _5 m% j( h) ?" r' e/ A6 I+ m
{$ V/ Q. ]7 c0 L2 r. _
#if MLINTERFACE >= 3
0 D# o( r* I+ a const char *s;
3 I; v* p9 X! H+ F1 i: D ^0 ]$ O( ~#else
, O9 Y2 { b- ^7 Q4 O kcharp_ct s;
( I+ b4 D y$ F#endif /* MLINTERFACE >= 3 */
# [3 @/ l! z, U, A if( tag == MLTKSTR) putchar( '"'); o8 w) ~" U+ _ Y/ R2 ^
if( MLGetString( lp, &s)){- q7 v5 G9 Z. G1 N. P
//printf( "%s", s);1 O8 `# J) Z$ R
Form1->Memo1->Text = AnsiString(s).c_str();
6 N: n/ y6 k0 F1 G: h+ g/ x MLDisownString( lp, s);+ i3 M7 ^0 p* p
}
# z' R. |1 I3 x- i# b0 s" b* \ if( tag == MLTKSTR) putchar( '"');
4 h3 b: t/ }- `! f5 S8 `0 j putchar( ' ');; q! J. }. J# W2 O% U
return MLError( lp) == MLEOK;- i% Y8 p V+ o$ t% A; P. u& r
}& q6 N2 }2 X+ }$ c! U7 J
0 j/ G& G3 {& R! _: a+ Z4 Ystatic void error( MLINK lp)
8 X8 M9 ] X, x2 e{
9 w {1 O" o h: z- M if (MLError( lp)) {7 L6 _0 n2 g( g* |. L) W
fprintf( stderr, "Error detected by MathLink: %s.\n",
( z1 J1 o/ ~6 Q: x# `; H/ B$ U MLErrorMessage( lp));" k9 v5 k6 Y" f9 B* d6 b+ }
}else{
8 \2 i( F+ E, K- P" ^ fprintf( stderr, "Error detected by this program.\n");
3 I: \# N! O% ^6 b4 O }( s. E* F1 M* E- W& |& k6 V9 h9 i+ K
exit( 1);1 t% a9 [ E1 W- V
}
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