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这是我写的数据连接代码。
$ M; x2 D4 l0 m6 o//---------------------------------------------------------------------------1 ]* b. ]" o' K) C
0 h4 g9 B1 R9 e0 @ F. y#include <vcl.h>) n- Y9 V7 r/ @0 c; ]) ^
#pragma hdrstop
4 {' `9 Q6 Q, O' G% U3 Q& G& q; I+ @' d
#include "Unit1.h"
5 R- ]/ F* r, a! o* q+ R#include "Stdlib.h"
6 }- E: y0 F( B1 r. v( i#include "Stdio.h"2 X$ @* i9 [6 l7 [. {7 N
#include "mathlink.h") Q3 Y& u" l/ @4 W7 W
#include "String.h"
# y" h- p9 u \' g$ t) Fstatic int read_and_print_expression( MLINK lp);1 ~$ Z% g0 {, ~ _6 B8 z/ n
static int read_and_print_atom( MLINK lp, int tag);0 O: O# n/ ?6 h* I
static int read_and_print_function( MLINK lp);
% ?# ~" Q6 Z9 R6 z3 t" r//---------------------------------------------------------------------------
. B. ]5 j# N! h+ |, d+ l- x( i#pragma package(smart_init)9 o& ^4 N& w c+ M0 p
#pragma link "RzEdit"8 u4 m+ l8 K1 l
#pragma resource "*.dfm": M2 W9 X" c. J' r0 n- l
TForm1 *Form1;. t4 x+ s; L- G: H) M0 ~5 o
# B/ I* a3 S" }: [8 ~
int sum;) Z$ Q9 K& j! h
double tmpbackreal;
, p# r2 I1 y) M4 w& b" BMLEnvironment env;
' U$ Z8 `+ [ i6 [MLINK lp;
) ?1 S( i! g6 Mint argc = 4;1 y& ]0 H2 J2 Q6 A+ g) a; O* q
char *argv[5] = {"-linkname",
" l0 k4 g, G: w& j; B' ? "D:\\Program Files\\Mathematica\\9.0\\mathkernel -mathlink",
* Z2 T1 H6 C' I& L: C8 M. `$ j "-linkmode",
) W$ e4 j) `- b" e; ^ "launch",% q5 k, U, u( Q8 K: ^9 L
NULL};
/ m7 G1 ?4 m- M+ Z7 k/ N0 i+ x @9 T# N* j* w. }
//---------------------------------------------------------------------------
& M }% @8 i% [" h/ V__fastcall TForm1::TForm1(TComponent* Owner)
6 j" h( q& I3 |. Y9 f/ u- F8 O0 q : TForm(Owner)) O! l9 T; U: j1 K# G1 i7 ~
{
) S6 U. @9 j+ r3 G( X2 D}) T8 f1 P) F: o4 p% U4 {
//---------------------------------------------------------------------------) s8 V& [5 f! C6 X# H$ K4 z
void __fastcall TForm1::Button1Click(TObject *Sender)
0 p" H( G" L Y2 O* @{
" e% G% f( d7 C; g0 } const CHAR *pOutputString;
, f8 u C& ~5 O/ u MLPutFunction(lp, "EvaluatePacket", 1);
4 u) S7 F, F9 ^5 I$ D1 `# X5 U, y MLPutFunction(lp, "ToExpression", 1);
$ _& x+ N( ^, c& m2 A MLPutString(lp, AnsiString(Edit1->Text).c_str());7 C4 U8 N. V% {
MLEndPacket(lp);
- ^ @& a% d3 k: K# i while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
* Q9 w- c+ h! j- R0 G0 P read_and_print_expression(lp);
9 }8 |9 V/ u7 Q- R) n. ]/ e}
( q1 g8 t9 v# E//---------------------------------------------------------------------------# S9 g& o& u% K d+ k, {
void __fastcall TForm1::FormCreate(TObject *Sender)
8 e" o& j; w5 L" f{4 Q7 g2 d- `' I: s
Edit1->Text = "Power[2,5]";
( E: V3 H3 t0 S0 j( V2 }% I: u env = MLInitialize(NULL); if(env == NULL) Edit2->Text = "出错env" ;
+ `' i+ Y: I" _( D) _) ?0 G0 u" C lp = MLOpen(argc, argv); if(lp == NULL) Edit2->Text = "出错lp" ;
! c: h: Z( P* M+ y! B2 V+ Q}
, y+ A: K1 w1 T( L' t' h/ F//---------------------------------------------------------------------------! M8 h$ N; Y+ I( e4 V+ v
; c" Q6 c6 I; P5 {7 b' Wvoid __fastcall TForm1::Button2Click(TObject *Sender)# ?* y) p1 g# j/ {) }: k
{
' u1 h' A! z9 H MLClose(lp);
0 Q6 |1 P8 {; C! \ MLDeinitialize(env);* A, v- Y3 U. s+ {* d0 h
}
Q' R4 j$ J, J* T6 g( x//---------------------------------------------------------------------------
; ^6 s! e8 A% ^* g$ Gstatic int read_and_print_expression( MLINK lp)
, q8 c V8 N! \" e7 K{/ |: W) g6 r. `; v
int tag;5 K; ^. b. p. u! K: Y! {
0 \ g% K' o4 Q$ L" N4 U
switch (tag = MLGetNext( lp)) {
( ~, k2 i7 `3 D# A) ?$ [8 d case MLTKSYM:
6 K3 w. L! D( G2 g- [ t case MLTKSTR:
7 x% C0 b/ k7 q" w7 i7 s case MLTKINT:8 ?% O! B# t( r6 G: |7 l0 H6 Z( L
Form1->RzNumericEdit1->Text = tag;
4 U) c( U' }1 W8 h5 `# h# }" J Form1->Label1->Caption = Form1->RzNumericEdit1->Text;1 t( r: J ^: D! z+ j, \* N8 ~
return read_and_print_atom( lp, tag);
+ |/ ^# d$ Q& w t case MLTKREAL:: U. X" m" ]+ B7 {/ c/ E7 w
Form1->RzNumericEdit1->Text = tag;8 N% J) b( N, X; {- j+ Q
Form1->Label1->Caption = Form1->RzNumericEdit1->Text;
* L$ `1 B2 v( U7 K+ H% s! _. S* i return read_and_print_atom( lp, tag);% ^2 K! [7 z5 Z. X# L" L
case MLTKFUNC:
' [; x2 M+ J/ u1 ~ @. s return (read_and_print_function( lp));5 Y1 R9 G/ }0 c8 E$ T7 Z
case MLTKERROR:
7 E$ m; g" _; U% p. [ //case MLTKGRAF; j2 z* k W% j/ `+ }+ d7 Q7 h6 N
default:" }( j+ _; ]$ J
return 0;. _' I% h7 @. l- |, m6 k0 E
}
/ R( V ]# _! C; O% |* }
( q; |" U9 F9 R' D* J, e}
' p0 f1 d7 y' X& ]: N: V [: m p" k. b
static int read_and_print_function( MLINK lp)
- m# l) Q4 f/ Y{
3 P7 [( w; I- P! E4 r5 [2 J int len, i;; T+ T$ _6 f) Y5 t; P& G
static int indent;
, D5 g+ U# ^7 t5 P9 R. n0 F4 c ]2 u7 k# C
if( ! MLGetArgCount( lp, &len)) return 0;* |. n8 C j6 }6 u
+ R) D5 T1 z: V
indent += 3;
' R: `2 W( f$ | H printf( "\n%*.*s", indent, indent, ""); u/ m$ t4 q! J4 B( w
) r6 c' @6 {) M, b! y if( read_and_print_expression( lp) == 0) return 0;
( n% K) U/ K* ^! T" p printf( "[");6 g+ l8 T4 D! I. ^$ M( x' v
5 T" b' M: G6 U8 ~) t n# J
for( i = 1; i <= len; ++i) {5 U/ O# C0 K7 p: E: y b& N3 x6 e* |
if( read_and_print_expression( lp) == 0) return 0;" A. T( Q, _ l. Y8 m% _
if( i < len) printf( ", ");! X! q7 C" Z E; }! k8 ^" ]& V s
}/ f5 o% ]3 ?5 i. X4 Y' l l
printf( "]");2 ]9 \5 `7 P( v
indent -= 3;: Q7 o# ^6 C8 U3 X$ i# V' m; f
8 n: h8 a8 N: E
return 1;8 `% \* ? i y# s. l& l3 _* N
}
: F5 q# g4 O/ S
- Q2 ~& r+ E3 X4 Q& Qstatic int read_and_print_atom( MLINK lp, int tag)
5 ]) {. j- E* ?{& q, m( v# c: L; M( C
#if MLINTERFACE >= 3: i& c, _: r, Q& y
const char *s;
! k3 F: k U6 ?9 w#else+ A+ r7 D1 o, g( @% h+ B
kcharp_ct s;0 E& f9 c6 {$ [5 ~ E' Q& z# i% _- r
#endif /* MLINTERFACE >= 3 */) m% ~8 q, E2 a! Y2 @6 |
if( tag == MLTKSTR) putchar( '"');1 i: u1 p$ o! J( p1 Z/ d
if( MLGetString( lp, &s)){
1 p X! O3 r+ E //printf( "%s", s);
/ z7 s! o1 D+ c- `% F. Y0 U Form1->Memo1->Text = AnsiString(s).c_str();4 f1 Y4 w6 [' r% H% A7 L7 P
MLDisownString( lp, s);' ]0 w# D* Y; z
}
, ?/ b, a7 l7 y( }8 {) n) H: Q if( tag == MLTKSTR) putchar( '"'); h% g4 v3 J d; R
putchar( ' ');. t: E5 \/ T9 a, u0 u0 ?7 p' Q
return MLError( lp) == MLEOK;
1 i Q9 K9 L1 j}
6 {1 t" y1 X& T, u4 f/ ]
3 H6 [) n9 B1 c* }( @7 I' t/ R6 ystatic void error( MLINK lp)$ X4 e5 J0 W/ u" m
{/ R# d* s( q2 e4 h S' `3 k
if (MLError( lp)) {# r0 d3 W f' }+ C
fprintf( stderr, "Error detected by MathLink: %s.\n",
2 g4 n$ @5 H: f3 h* e g( r MLErrorMessage( lp));
) W( w+ N( k4 d V- V# v7 z0 _ }else{
9 y& |+ h i K) @. t fprintf( stderr, "Error detected by this program.\n");
; m+ r1 C; g9 ?5 B$ { }
: t0 Y% l! O1 U* ]4 a exit( 1);, U1 ], T% Z1 h" ]' v' f9 _' [
}
8 O8 ^, t W7 R* ]$ m |
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