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这是我写的数据连接代码。2 v; G; U* M( d5 _
//---------------------------------------------------------------------------, C+ a+ }' \* n* R# A& ?2 `
4 h( } W( ~' u2 ?3 v
#include <vcl.h>9 Y3 i- p+ ?0 c0 [* a: n2 O7 ?
#pragma hdrstop
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#include "Unit1.h"
( U" P6 F# E* X#include "Stdlib.h"6 F- S, y! o: U
#include "Stdio.h"
" @% A! c5 i( { P2 {4 \8 i! T. @#include "mathlink.h"
& @0 S" D" {# d! U4 r#include "String.h"
' i# X6 _4 o7 u6 I, Tstatic int read_and_print_expression( MLINK lp);3 Q; C% d- t8 D( Y0 m- C
static int read_and_print_atom( MLINK lp, int tag);* V- S" ] E* `( H' u5 {4 b# I
static int read_and_print_function( MLINK lp);
: K2 |- V1 q; J& F//---------------------------------------------------------------------------8 t, j: h9 ]) V1 D) M t
#pragma package(smart_init)
: H: t$ j1 _, d! p#pragma link "RzEdit"
: ~/ w$ e' f6 _( s6 O0 _" M5 F#pragma resource "*.dfm"! |0 h" ?7 D& b6 @0 ~, q0 q$ O4 L! u; i
TForm1 *Form1;
9 M7 s- ?) {! Q
- |0 F! `* S0 c2 Eint sum;
q- _+ d8 x2 Q! K, idouble tmpbackreal;( b- I( b/ \+ z2 I+ N" ?0 N4 \
MLEnvironment env;, V1 A/ x% O0 T" E( t1 ^
MLINK lp;
) \' J4 J2 P) ^int argc = 4;
: I/ z' I& l/ }# J+ o9 h* ochar *argv[5] = {"-linkname",1 Q, e; l7 H; {2 g l& ~2 Q0 F
"D:\\Program Files\\Mathematica\\9.0\\mathkernel -mathlink",
3 Z) [; ]- O. ~: f "-linkmode",. }9 W% `7 h+ h# d0 i" V+ r2 l
"launch",% x5 [# c$ b, \( y+ R
NULL}; f+ o. u: K5 c
0 N! ?3 s. U3 y' K# }9 K; R//---------------------------------------------------------------------------
% a8 M3 N( D5 n__fastcall TForm1::TForm1(TComponent* Owner)# g' ^" c {9 q9 e8 T! @5 V
: TForm(Owner)
+ x+ e! `* }* s{
% ~8 ?2 Q& o1 T4 Y- f! z7 n- U) x}& @8 R) T- C5 x
//---------------------------------------------------------------------------
0 w" X1 @+ a& |! g% ?+ vvoid __fastcall TForm1::Button1Click(TObject *Sender)
: x5 Y4 }# L* q; v( U c& @+ |{
" O/ U" b/ M8 w/ B; F" J9 { s6 I const CHAR *pOutputString;
|) F3 _2 e/ _8 o# ]; _+ W MLPutFunction(lp, "EvaluatePacket", 1);
* [0 d+ | S7 c) j MLPutFunction(lp, "ToExpression", 1);
( ^9 _- B+ ?& \) l5 I MLPutString(lp, AnsiString(Edit1->Text).c_str());
* @7 S3 E' b. l/ _3 Q+ r MLEndPacket(lp);
% s! @, q) t) ?- n, T. \ while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
' i( F1 K Z }5 Z read_and_print_expression(lp);
3 Q( x! ?% A* p) E7 }}
; K( Q( M: i* A& U$ s. Q" Z9 I' L//---------------------------------------------------------------------------
; H) v, l) l. qvoid __fastcall TForm1::FormCreate(TObject *Sender)! u" k. s" i9 v" T' G
{
' i3 c% @1 ]# C A Edit1->Text = "Power[2,5]";
9 @1 ~4 u& e% p) \' I4 u env = MLInitialize(NULL); if(env == NULL) Edit2->Text = "出错env" ;
' p e3 |( @# k# P/ ?9 z; ?8 G lp = MLOpen(argc, argv); if(lp == NULL) Edit2->Text = "出错lp" ;! P' x, I4 d( W
} f7 o# H) f" |
//---------------------------------------------------------------------------+ C" }7 N0 J" L0 t) a
! x* B2 c# H2 y! y: \1 m- ]
void __fastcall TForm1::Button2Click(TObject *Sender)! z$ G, `2 t8 W2 q9 e/ [1 g
{
2 w8 N. k8 j! B, u# Q$ Q) I! J MLClose(lp);, ~ P8 \- X: ]; f6 Q
MLDeinitialize(env);0 `5 G2 m; r5 V- u$ O1 b4 i5 H
}* ]* p# a: U& N* ^, w
//---------------------------------------------------------------------------, w( W& _$ y" j+ i
static int read_and_print_expression( MLINK lp)6 R" n+ r+ l4 o# m8 Z* U" E
{0 l$ w3 @5 _6 ~- g
int tag;. {: w8 Q) ]# p* b/ a9 m
5 n5 E" b7 ]) g U' X switch (tag = MLGetNext( lp)) {
) J' c, v# w2 Y; S5 t' z case MLTKSYM:3 m r* G# J) A+ g4 q$ `
case MLTKSTR:3 z9 d8 q/ C8 n f$ D
case MLTKINT:
0 N. Z) }4 [8 B1 d# o Form1->RzNumericEdit1->Text = tag;
: o& ~/ r6 {- t. ^, ] Form1->Label1->Caption = Form1->RzNumericEdit1->Text;
. L" i4 X3 G* ]& M' I return read_and_print_atom( lp, tag);
% B+ G1 G4 F8 m5 U4 {- K7 m* E case MLTKREAL:. H5 b+ v, B& }1 [+ f
Form1->RzNumericEdit1->Text = tag;9 L- r/ h' X! Z5 z
Form1->Label1->Caption = Form1->RzNumericEdit1->Text;3 X7 d6 o1 D% j) }0 ^8 H L
return read_and_print_atom( lp, tag);
6 D& `$ E, M/ Q2 o( q/ f$ h7 h case MLTKFUNC:; M- y, H2 c' t2 R6 v/ J" z
return (read_and_print_function( lp));
5 }! S" f, |; {( q case MLTKERROR:/ G/ C* u) a5 J1 J9 y! l0 M
//case MLTKGRAF;2 w4 ^6 r' s7 v. o* d! [4 R
default:
3 i+ w/ g: [( H return 0;
- U9 W" L; c7 z+ X, t- J i }
3 p' N# {3 D T+ E# t/ Z$ L6 R4 u5 ~ Y
}
( c7 ]- g g- m3 a) _) D" f$ U7 P1 D% w \( D8 H- d, v
static int read_and_print_function( MLINK lp)0 @4 E- {, P, o. y1 f3 D
{
7 X8 S" B, Z8 e8 g' ~7 h% K9 z0 P int len, i;" I4 K0 v9 Q! E( }+ y9 A
static int indent;# q3 v$ w, a( W/ L) t
- k; \ s, c' e) q' c
if( ! MLGetArgCount( lp, &len)) return 0;
4 `% J6 w; M0 z% q! R8 F y" X2 I# e# Y# U& x4 U) d
indent += 3;
+ z$ r9 C4 q( K+ u) o; a3 |' x! Q printf( "\n%*.*s", indent, indent, "");
3 p8 w0 i; j8 d( N1 ~5 e
4 d* o* y' J% ^' Q if( read_and_print_expression( lp) == 0) return 0;
( d8 l8 d; K6 w. P printf( "[");- D7 g( S2 u8 {! }8 t( K. A2 U
$ Q% `! I( R7 m% r- X for( i = 1; i <= len; ++i) {- t% B7 R( ~# m) Z. x. C6 s, m0 P
if( read_and_print_expression( lp) == 0) return 0;6 A6 ^+ o, A$ y* N8 v% u1 `
if( i < len) printf( ", ");; H& p4 p* S5 T, M8 r! T/ G# P. ?
}6 B) ?2 I9 m4 Y# V5 h- ?
printf( "]"); [5 A, x- J% @* R" Z
indent -= 3;
+ |8 V3 R0 x. g! q; S7 U H4 g3 h1 ~2 M' x6 |5 G; I5 d4 E
return 1;5 M% B$ R% a- R9 F3 _; N
}* n6 ~2 n9 d' s. S3 x7 R
2 y5 b0 ?0 f1 w2 }' v4 d% hstatic int read_and_print_atom( MLINK lp, int tag)- P; F& M- z$ D# F( }
{( r( i7 ^$ S/ ?; p3 M% K
#if MLINTERFACE >= 3. O& e: L1 ?7 \
const char *s;
. {- y' Z6 Y) Y4 c9 J; ?* l' z#else
2 b) U* m9 z. ~* R+ Q3 x kcharp_ct s;
! x% ]( q0 u7 y% t% t4 i# H#endif /* MLINTERFACE >= 3 */# [: X8 D( n4 P) r# r! l
if( tag == MLTKSTR) putchar( '"');
! z2 N7 q7 W$ R& n1 I4 D+ Y if( MLGetString( lp, &s)){' C# e# v% {$ m5 v2 `
//printf( "%s", s);
( n" _- X6 s( x Form1->Memo1->Text = AnsiString(s).c_str(); \8 ?" v6 t& T- n X! n3 c# j
MLDisownString( lp, s);
. c' d3 t& w! j( N4 S1 m) L }
, E; q0 T- y: ?( b& O if( tag == MLTKSTR) putchar( '"'); s6 a8 c# ]) E" O6 B5 O
putchar( ' ');4 B) | X% {' V, ?$ t& Q
return MLError( lp) == MLEOK;
: ^( i2 d6 L* L8 T' e0 i# ]}
% E' o, b6 J2 \" ~6 T: X8 m1 P: q$ H" D& s. e+ _/ w- W" i% v: ?3 y
static void error( MLINK lp)! q; l6 s& Q& T2 ~
{
# z! S I5 \% @$ H8 p; S if (MLError( lp)) {# E2 P4 ~$ \& }* R! ~( B
fprintf( stderr, "Error detected by MathLink: %s.\n",
/ |4 c4 C' ?2 l1 q' G MLErrorMessage( lp));
: _* f9 ^# w2 u8 b5 V* B4 N }else{9 B8 q; f) p3 M8 n0 O
fprintf( stderr, "Error detected by this program.\n");4 N6 n5 F+ o' }( E3 F' r4 L9 @
}0 Y+ J6 \9 _5 d/ I) |
exit( 1);- @# o0 i9 ^9 @4 f/ |/ s6 R
}
; M8 t/ |4 _1 s/ U; x, d |
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