- 在线时间
- 6 小时
- 最后登录
- 2017-8-7
- 注册时间
- 2014-12-24
- 听众数
- 6
- 收听数
- 0
- 能力
- 0 分
- 体力
- 23 点
- 威望
- 0 点
- 阅读权限
- 20
- 积分
- 10
- 相册
- 0
- 日志
- 0
- 记录
- 0
- 帖子
- 4
- 主题
- 1
- 精华
- 0
- 分享
- 0
- 好友
- 7
升级   5.26% 该用户从未签到 - 自我介绍
- 学习路上
|
这是我写的数据连接代码。, S" }4 x. M! ]+ q6 x, Z2 I" V
//---------------------------------------------------------------------------: q, N: R! ^+ s& H0 ?
, b4 c6 t* P7 a* a#include <vcl.h>9 ~! h& W& o. s
#pragma hdrstop
9 J& j2 L5 p+ H( f0 X& u0 b6 n6 f
2 B& m, |/ y9 S8 G' a4 g; s7 {#include "Unit1.h"
0 p4 |8 x* T- u#include "Stdlib.h"
g4 f# H, l+ D) K% H0 C, s#include "Stdio.h"
) _7 s% u' R0 T#include "mathlink.h"
! T, D- O( |7 |+ W8 U: r3 M" u( D0 `#include "String.h". K' d: P3 ]" K1 {
static int read_and_print_expression( MLINK lp);
' k3 ]& c# p* M6 {8 jstatic int read_and_print_atom( MLINK lp, int tag);
1 H; q% v2 ]) ^& z5 Z j$ ^' E2 gstatic int read_and_print_function( MLINK lp);# }/ T5 L9 `( T0 W) }/ J
//---------------------------------------------------------------------------+ Y' y# J7 v ]5 F
#pragma package(smart_init)
* Z1 S- T( O7 X+ C# x/ \; k#pragma link "RzEdit"! v ^* Z6 l: I7 l: J% C4 X' _
#pragma resource "*.dfm"& R6 M' e. u3 N) D4 l+ N
TForm1 *Form1;1 N" d) ]/ O; a$ V8 c* Q f
6 {) X$ R; b; A8 V" N# U
int sum;
7 n+ |. g& c" K; e& H t7 hdouble tmpbackreal;9 q+ x3 }- \* Z
MLEnvironment env;
# R) g( z. e4 w1 u9 f" _9 N# M+ oMLINK lp;, g, n' G6 I" J7 a
int argc = 4;
: b E, i" Y: S9 w& Wchar *argv[5] = {"-linkname"," ]" Y! p& N- \
"D:\\Program Files\\Mathematica\\9.0\\mathkernel -mathlink",
* M1 }4 |: g& q; y "-linkmode",
* r( @7 |& H& l9 p" k2 D "launch",) j+ R$ p7 s: T _
NULL};4 {2 R) ? M0 S
+ v; \9 U( [+ g, X) d
//---------------------------------------------------------------------------& O: e7 r3 y1 A/ R8 y8 p, l
__fastcall TForm1::TForm1(TComponent* Owner)
+ u" b" ^+ i: o( O$ e3 o2 y : TForm(Owner)$ u* ` n# x: O/ }: j
{
. k: d# z, x0 J) w8 v}
& Z5 ?7 o, [* E3 T$ g//---------------------------------------------------------------------------" a3 _3 r+ L( R0 g
void __fastcall TForm1::Button1Click(TObject *Sender)) V: Z# Y2 b$ Y2 C
{
- R, ]) L% E6 r; D1 i( Y8 R const CHAR *pOutputString;6 }6 M- D h. |
MLPutFunction(lp, "EvaluatePacket", 1);
9 f0 @; {5 Y6 {+ \) A MLPutFunction(lp, "ToExpression", 1);
2 O* _6 R$ ?1 Q* A+ c MLPutString(lp, AnsiString(Edit1->Text).c_str());
: Y! R5 g8 U: r3 Q3 P MLEndPacket(lp);
q( F0 K j$ ^ while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
2 z; B# C( P& D6 v! Z) X) z* s read_and_print_expression(lp);: _7 d& T) w& b! m. j& `0 n
}
# O2 L) c a! J- t8 v//---------------------------------------------------------------------------- |) ?& w$ V4 K: _. q# v) d
void __fastcall TForm1::FormCreate(TObject *Sender)
t5 R7 j/ ]: C{ b1 b; f9 Z; b( o, D P# X
Edit1->Text = "Power[2,5]";
$ S7 x0 E+ v$ C, D7 R5 v- W% f env = MLInitialize(NULL); if(env == NULL) Edit2->Text = "出错env" ;
8 R) k2 T( ` [( B" D7 G! D6 l _ lp = MLOpen(argc, argv); if(lp == NULL) Edit2->Text = "出错lp" ;
! ~# ?& Y: }! C7 q}
' ~4 r( {+ I i% c& U$ L//---------------------------------------------------------------------------
+ K; h% m9 T' {2 D0 o# y) g1 A& u0 n2 `. U
void __fastcall TForm1::Button2Click(TObject *Sender)
, {! K2 }" g) Z/ ?) S& S; {$ W" ~{
+ v# a1 E' o3 o3 Y n. t1 C MLClose(lp);
; H! j3 E# C! y" z$ b' z MLDeinitialize(env);
/ }$ L! f$ ^" E}
4 l$ p( B& S* y& L//---------------------------------------------------------------------------
+ y0 P& Y( F$ v3 hstatic int read_and_print_expression( MLINK lp)
* m, \" I( g, w/ r% e8 c$ R{
6 f4 C, U1 _$ o' N int tag;1 f& |3 l' k1 r" v
2 w5 ^( h1 P: u4 m
switch (tag = MLGetNext( lp)) {
, I+ V& E6 J3 z case MLTKSYM:
6 i7 I' @& v1 t7 `$ b- t) ?$ t case MLTKSTR: f- ?& O- {* V1 {; p8 q' K( G. E" J
case MLTKINT:4 J* a1 w: V1 ]: c' f1 h9 k
Form1->RzNumericEdit1->Text = tag;
+ B: c5 {! E0 @) H, g Form1->Label1->Caption = Form1->RzNumericEdit1->Text;
- n& R# @" e" h$ j" [ return read_and_print_atom( lp, tag);4 H: _ E% U3 p6 O8 f2 o8 _4 r
case MLTKREAL:
' a3 y. L* X: s& q; @9 V# E Form1->RzNumericEdit1->Text = tag;
9 i" l+ I/ G- w4 t+ n E- E Form1->Label1->Caption = Form1->RzNumericEdit1->Text;* t6 S$ w( H8 K5 f& u
return read_and_print_atom( lp, tag);
6 s% E' ~9 H& s- N' F case MLTKFUNC:- D) P6 E8 c7 Y9 F& L/ @
return (read_and_print_function( lp));
1 x2 e6 }# J- O- ?9 P case MLTKERROR:
$ o; H& B+ m6 `, j* s. Z2 ` //case MLTKGRAF;
0 z, B4 k# ~9 g4 s) H, | default:
# B2 B6 f5 ^ {! ^" F return 0;* H2 R, C% V1 ^! ]( U' l% _
}
, d7 B$ J% |7 d: t9 t1 l6 z3 }1 t9 k9 Y( q
}1 d0 @+ X% e% B, R; x
0 ]5 q- X- E& b6 I) Istatic int read_and_print_function( MLINK lp)
" m- Y2 |8 Q0 T4 V{
! P! r+ a) r( [" y; W int len, i;
8 a) B! K5 k% ` static int indent;
+ O; U, `) Y* J' d5 Y+ j+ ~
- J+ A# K7 ]9 A" c; t$ o if( ! MLGetArgCount( lp, &len)) return 0;1 p" d2 {) |2 b/ F3 p
; z" o( u Z z/ W& ?) s, S indent += 3;: ~$ m" u& x' T3 f0 I! F
printf( "\n%*.*s", indent, indent, "");4 e0 V* d+ z0 e+ N) W
) @5 @ W! `% o
if( read_and_print_expression( lp) == 0) return 0;
! k' ` q" V' m2 V. J4 q4 O5 H8 w printf( "[");7 i" `$ I% l- N' D% F! |
2 }3 u+ Y, q* |) }
for( i = 1; i <= len; ++i) {
) Y0 ^% A( X, A$ R+ j2 D if( read_and_print_expression( lp) == 0) return 0;
; F2 N; p3 G7 W0 B* e4 V0 |& ^& P if( i < len) printf( ", ");
* ?. l- V% T* a% |4 c# J }( h$ {5 o A9 G7 f) m. p+ ^
printf( "]");% c4 V4 x) {+ x7 P( K
indent -= 3;
* j# t4 v$ X9 U# X0 Z6 @5 u: |% X
* B/ @! ?3 V0 Z1 C5 |& ?* q return 1;" N/ C. @3 X9 e5 X. a
}# ~* ]7 O7 X# h: F q
" Y) n3 l" A( |
static int read_and_print_atom( MLINK lp, int tag)
6 r8 v' j; Q* u6 B5 F4 Q4 k8 ?{/ C- z: a7 D( B% w& X9 o8 V
#if MLINTERFACE >= 3: j/ m E. ?7 x& y, P
const char *s;; y# V3 P! c# t L# g& v
#else. L, f. h. l% n, R' A' } C
kcharp_ct s;
+ c% V+ Q+ ?! e9 I8 c- V8 ]6 d5 B#endif /* MLINTERFACE >= 3 */7 ]6 T+ }( q- e o9 y% r. V# E
if( tag == MLTKSTR) putchar( '"');7 y* _* K6 T6 P5 D. `8 S) E/ ^
if( MLGetString( lp, &s)){1 b/ b' K# K3 x
//printf( "%s", s);& o9 I) l' j6 K
Form1->Memo1->Text = AnsiString(s).c_str();& }! ]" X; v# p: x
MLDisownString( lp, s);$ c' I$ a' J/ t+ e$ G6 c
}4 p, m" c7 c) J, _0 Y% ^3 V
if( tag == MLTKSTR) putchar( '"');9 o; d" D9 O, [' X" z
putchar( ' ');! \7 a" _7 U4 ~
return MLError( lp) == MLEOK;
, e4 s$ g P7 c' M' s: l}3 K0 S8 x4 l! Z1 h2 L
1 J- l( V) M5 U# W6 y7 t" l. qstatic void error( MLINK lp)( ^; m- S% X7 z {5 C
{
! N( q# |0 M7 a if (MLError( lp)) {
" V) O( X( d% k6 @2 } fprintf( stderr, "Error detected by MathLink: %s.\n",* Q! t g. r+ t- z( z% h9 W; J* y
MLErrorMessage( lp));
1 C8 r5 e6 z& d$ w' k' T! y2 w }else{
! L! C4 V, B! t* R/ s& D9 F: c0 v fprintf( stderr, "Error detected by this program.\n");
, ~8 S7 R4 h3 T7 ? }. }' G& q7 q# J. @* B
exit( 1);$ O- q' L1 d' K
}
3 ~1 V0 b$ v1 c& ^) v* O |
|