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这是我写的数据连接代码。* i u3 Y: i) L S$ v$ w% @2 ^$ h( l
//---------------------------------------------------------------------------) \& O: Y1 D& I* h, X2 Z
' a$ X, D7 ~! y8 t G% ~#include <vcl.h>6 ?& y6 _/ m8 A5 b
#pragma hdrstop+ @ t" X6 c) }, [
2 I: j6 p$ D5 u8 V& p9 l, ^1 W#include "Unit1.h"* n8 G: L6 |9 K7 `
#include "Stdlib.h"
' a; M r Z- `* s4 q#include "Stdio.h"7 ~) l0 r# N0 Y+ y
#include "mathlink.h"/ ]# L; G ], z* @9 J7 x, R
#include "String.h": \$ W8 W5 a# S5 U2 Z8 y+ ]) X
static int read_and_print_expression( MLINK lp);7 E( E% N. r- e
static int read_and_print_atom( MLINK lp, int tag);) u1 T# I6 j8 C
static int read_and_print_function( MLINK lp);
* |" m- V) @5 S J. l. P//---------------------------------------------------------------------------, P1 L. I' g+ z l) W5 D/ T
#pragma package(smart_init)
% E+ Y* { W0 ^3 Z#pragma link "RzEdit"
2 A! J* y \3 b6 n9 `#pragma resource "*.dfm"
6 l i7 O6 r) ^ s" Y8 a+ RTForm1 *Form1;
% j) h# `. O: M6 E/ R. X l3 z; x, y
int sum;
. X# d! }9 o8 C+ n0 Udouble tmpbackreal;. `3 F; s+ q' [# `
MLEnvironment env;
0 v( V* q! Y( K& U3 LMLINK lp;, e$ V( ~0 n1 G) f% ]' H
int argc = 4;
1 A1 ], K* R+ W% u( R9 ?char *argv[5] = {"-linkname",
/ }6 L' x& \. @2 d0 F( |9 L) G, a! P "D:\\Program Files\\Mathematica\\9.0\\mathkernel -mathlink",7 N. g! p- K2 q
"-linkmode",
2 \' o$ S6 K% ^; G; l& q4 _' X8 x "launch",
* m8 P9 ~5 p7 \' Y NULL};
$ G; m* o. t" v6 O/ m- S1 m
8 A7 {& ]7 ?, m1 ?8 d3 |7 r//---------------------------------------------------------------------------: ^. ?, W- u- u2 o5 g* k
__fastcall TForm1::TForm1(TComponent* Owner)' s* |6 B: a4 c5 A6 A" ^* d& |( R
: TForm(Owner)
2 e6 b5 i2 P W2 Y{
# ~! d# v! m9 ?" w" K}
* d" S0 I& d- A' ~! f4 H9 R5 b# [//---------------------------------------------------------------------------
3 a7 g+ N2 r" s" o3 j4 qvoid __fastcall TForm1::Button1Click(TObject *Sender)$ q0 o1 ^ [) B
{
# E4 s1 l4 V9 I+ ` const CHAR *pOutputString;
, c7 v0 G0 x$ i MLPutFunction(lp, "EvaluatePacket", 1);9 E8 Q1 Z# Q, K* f1 t
MLPutFunction(lp, "ToExpression", 1);
# a0 c( K: z, Q* | Y MLPutString(lp, AnsiString(Edit1->Text).c_str());5 n: Q1 v, l+ q
MLEndPacket(lp);
; u+ h( F! x) P! J- H2 Y' d while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
: B d/ M; q+ Z read_and_print_expression(lp);
% @& J2 |6 B& V7 {8 n* l' u: l}
6 o+ ]( { L4 @//---------------------------------------------------------------------------6 n- ?6 n6 M* H+ ~3 K$ w
void __fastcall TForm1::FormCreate(TObject *Sender)
- J1 |% `4 [2 l* M3 |2 N/ P- m{
* U; @9 |! T" d Edit1->Text = "Power[2,5]";/ m7 e# W" G5 H' r+ C8 D! R* ]
env = MLInitialize(NULL); if(env == NULL) Edit2->Text = "出错env" ;5 I" [2 ]; `% Y# P Y- y! B
lp = MLOpen(argc, argv); if(lp == NULL) Edit2->Text = "出错lp" ;
) `( l' l# H1 w}) P; b& p- u: s" |
//---------------------------------------------------------------------------
, a8 H6 V, E9 w. Q
$ Q* @/ x9 X- p# i- rvoid __fastcall TForm1::Button2Click(TObject *Sender)$ \: h* v" g z. f( u2 J' G8 L" b
{( K$ Z6 s# e; \# C
MLClose(lp);
8 U( D& \ h8 k4 V& M% d2 Z MLDeinitialize(env);% v5 o) F5 C# K J
}
& o0 l8 P9 }4 u" ~//---------------------------------------------------------------------------
4 W m( t4 s( Q. j9 T ~static int read_and_print_expression( MLINK lp)
# U, c# v0 F2 _4 {* N{9 n: D; {" l* b5 o9 k- u# `
int tag;( ^" K/ r4 ]* v0 {
9 `2 q% V) D9 y0 ~" |+ `
switch (tag = MLGetNext( lp)) {1 K- y( _/ G+ K( M6 Y5 ?
case MLTKSYM:
3 q3 Q+ L: p, P2 Y case MLTKSTR:
. G2 a7 w' I. M* O9 d+ h8 K0 { case MLTKINT:) L# }; [$ g) w3 h- U: U. u
Form1->RzNumericEdit1->Text = tag;- E, ^& H2 m$ Q0 y" Z8 Y* p( Q
Form1->Label1->Caption = Form1->RzNumericEdit1->Text;# E9 N+ V4 C# e# I
return read_and_print_atom( lp, tag);
+ {: Q) C: t, A case MLTKREAL:
. k( s; {, |: R& c7 i# J* A Form1->RzNumericEdit1->Text = tag;
$ v4 D; }' n$ x( R2 d Form1->Label1->Caption = Form1->RzNumericEdit1->Text;6 d: }0 m- A; p* q
return read_and_print_atom( lp, tag);/ g" D7 `. F2 [+ k& d$ W
case MLTKFUNC:
* J2 l* I. U, S1 B5 d return (read_and_print_function( lp));% K* [# f2 I( d( }7 ^
case MLTKERROR:7 ]3 s+ x0 f. d! ?6 u
//case MLTKGRAF;. s1 K0 J" M9 q2 W3 c; B
default:8 k1 ]4 t# \# M8 p4 n' O: X
return 0;) Z6 w9 D4 i1 D( j! U8 p
}
" ?+ J+ Z5 X, @5 {. K' _8 G0 { E3 v* E6 r
}& f! y. ~% g( \- F
( C ?/ _8 [! R- [ \9 O
static int read_and_print_function( MLINK lp)
7 M7 |0 x& B8 N0 x3 R7 T{
2 t/ E6 ~7 q) S% r int len, i;+ S0 W. Q, h8 L/ \) R, E5 j
static int indent; O( Z" B7 o t' p6 R$ `6 _/ c0 k
0 p- N' a7 o. N# I) i: T# a
if( ! MLGetArgCount( lp, &len)) return 0;1 T( ~0 i8 w; f( T! T6 H' e
( o3 c0 h* E1 t' ^, ^- @7 S# c' ]) Q
indent += 3;
' O1 N& c2 F* q g printf( "\n%*.*s", indent, indent, "");
7 q! W. x, {( ?* Y# M; h' E6 E& U# K$ w0 ~; q0 Q# n- |
if( read_and_print_expression( lp) == 0) return 0;2 U0 c0 H: {9 C* R6 `. Y$ B& ]9 X% r
printf( "[");
) j/ a( P% \7 t1 J
5 J- L, X& U5 q( y for( i = 1; i <= len; ++i) {7 D/ m. q+ v0 ?* V; [
if( read_and_print_expression( lp) == 0) return 0;6 [8 l4 F$ D6 m- u" O0 V
if( i < len) printf( ", ");2 g' R( a! v- O
}
) N& l7 c( _; K: l! H printf( "]");
/ J9 T. U. V6 c3 e3 e7 i indent -= 3;( |- m, k' g }3 P
S2 M8 X4 H9 S8 v% y8 [ return 1;+ ~ q' ~! F1 o0 r
}
# i: m! B' g0 U R/ j# u7 y0 w: e% d3 Q% F/ \
static int read_and_print_atom( MLINK lp, int tag)! k; q, |& n$ a- P. F
{
9 g% |# X6 w* @( y8 w0 w' X#if MLINTERFACE >= 3) g8 J( |, N) K/ Z
const char *s;
) _! {( l: |/ O+ T! r& G% x4 i#else5 p$ b9 i) Y" g& b9 Z
kcharp_ct s;
$ u6 Y7 x6 ^) I0 a# F# n#endif /* MLINTERFACE >= 3 */
, R4 Y/ H z8 B5 p% S# T if( tag == MLTKSTR) putchar( '"');3 w2 U* _/ A7 `5 \" H& c
if( MLGetString( lp, &s)){4 m' v9 P/ G) G" @" u
//printf( "%s", s);
& i3 A5 P" Y7 W8 C' }3 n Form1->Memo1->Text = AnsiString(s).c_str();' u8 h, {/ n' ~1 F% m2 w
MLDisownString( lp, s);
# U& N* t/ q n }
0 y7 H( A1 h9 h3 n& L: p4 C if( tag == MLTKSTR) putchar( '"');0 s* s# I8 K6 [* _
putchar( ' ');4 M: _9 @9 S- k4 n( ~
return MLError( lp) == MLEOK;
6 o Y: N3 |' J0 x1 M* S}% S+ n9 O W5 O* z/ r
% |* w! T& t0 z$ d8 i5 w* i
static void error( MLINK lp)
* _& s8 ]0 I+ Z' e1 t3 c{
/ _3 c4 H8 m6 d- ]# d if (MLError( lp)) {
; \" r' Q6 C3 w/ S# j& |/ L fprintf( stderr, "Error detected by MathLink: %s.\n",1 J9 Q9 e4 r5 O1 V. Z( E
MLErrorMessage( lp));5 i# p" R/ m9 R1 I) p' [- N
}else{& G9 ]; F" ?# a$ J
fprintf( stderr, "Error detected by this program.\n");
, k& x6 a2 _, B, y) r }
% R* u. g V a" M9 Q! r) B( b exit( 1);
' F8 ^# _8 X* Z) \# m( N* A}
7 L8 T; m4 b- ]5 \% t8 v |
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