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标题:
应用程序通过mathlink建立与内核mathkernel的连接
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作者:
freelark
时间:
2014-12-24 15:07
标题:
应用程序通过mathlink建立与内核mathkernel的连接
目前可实现
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1、c++与mathkernel的连接,交互数据。
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问题是:无法实现图形输出,更谈不上图形的动态交互。
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附参考书:mathlink帮助
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A MathLink Tutorial.pdf
2014-12-24 15:06 上传
点击文件名下载附件
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作者:
freelark
时间:
2014-12-24 15:17
这是我写的数据连接代码。
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//---------------------------------------------------------------------------
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#include <vcl.h>
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#pragma hdrstop
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#include "Unit1.h"
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#include "Stdlib.h"
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#include "Stdio.h"
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#include "mathlink.h"
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#include "String.h"
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static int read_and_print_expression( MLINK lp);
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static int read_and_print_atom( MLINK lp, int tag);
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static int read_and_print_function( MLINK lp);
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//---------------------------------------------------------------------------
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#pragma package(smart_init)
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#pragma link "RzEdit"
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#pragma resource "*.dfm"
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TForm1 *Form1;
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int sum;
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double tmpbackreal;
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MLEnvironment env;
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MLINK lp;
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int argc = 4;
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char *argv[5] = {"-linkname",
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"D:\\Program Files\\Mathematica\\9.0\\mathkernel -mathlink",
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"-linkmode",
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"launch",
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NULL};
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//---------------------------------------------------------------------------
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__fastcall TForm1::TForm1(TComponent* Owner)
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: TForm(Owner)
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{
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::Button1Click(TObject *Sender)
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{
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const CHAR *pOutputString;
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MLPutFunction(lp, "EvaluatePacket", 1);
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MLPutFunction(lp, "ToExpression", 1);
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MLPutString(lp, AnsiString(Edit1->Text).c_str());
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MLEndPacket(lp);
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while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
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read_and_print_expression(lp);
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::FormCreate(TObject *Sender)
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{
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Edit1->Text = "Power[2,5]";
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env = MLInitialize(NULL); if(env == NULL) Edit2->Text = "出错env" ;
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lp = MLOpen(argc, argv); if(lp == NULL) Edit2->Text = "出错lp" ;
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::Button2Click(TObject *Sender)
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{
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MLClose(lp);
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MLDeinitialize(env);
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}
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//---------------------------------------------------------------------------
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static int read_and_print_expression( MLINK lp)
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{
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int tag;
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switch (tag = MLGetNext( lp)) {
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case MLTKSYM:
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case MLTKSTR:
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case MLTKINT:
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Form1->RzNumericEdit1->Text = tag;
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Form1->Label1->Caption = Form1->RzNumericEdit1->Text;
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return read_and_print_atom( lp, tag);
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case MLTKREAL:
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Form1->RzNumericEdit1->Text = tag;
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Form1->Label1->Caption = Form1->RzNumericEdit1->Text;
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return read_and_print_atom( lp, tag);
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case MLTKFUNC:
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return (read_and_print_function( lp));
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case MLTKERROR:
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//case MLTKGRAF;
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default:
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return 0;
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}
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}
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static int read_and_print_function( MLINK lp)
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{
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int len, i;
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static int indent;
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if( ! MLGetArgCount( lp, &len)) return 0;
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indent += 3;
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printf( "\n%*.*s", indent, indent, "");
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if( read_and_print_expression( lp) == 0) return 0;
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printf( "[");
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for( i = 1; i <= len; ++i) {
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if( read_and_print_expression( lp) == 0) return 0;
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if( i < len) printf( ", ");
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}
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printf( "]");
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indent -= 3;
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return 1;
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}
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static int read_and_print_atom( MLINK lp, int tag)
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{
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#if MLINTERFACE >= 3
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const char *s;
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#else
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kcharp_ct s;
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#endif /* MLINTERFACE >= 3 */
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if( tag == MLTKSTR) putchar( '"');
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if( MLGetString( lp, &s)){
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//printf( "%s", s);
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Form1->Memo1->Text = AnsiString(s).c_str();
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MLDisownString( lp, s);
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}
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if( tag == MLTKSTR) putchar( '"');
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putchar( ' ');
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return MLError( lp) == MLEOK;
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}
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static void error( MLINK lp)
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{
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if (MLError( lp)) {
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fprintf( stderr, "Error detected by MathLink: %s.\n",
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MLErrorMessage( lp));
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}else{
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fprintf( stderr, "Error detected by this program.\n");
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}
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exit( 1);
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}
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作者:
freelark
时间:
2015-1-5 17:37
本帖最后由 freelark 于 2015-1-5 17:38 编辑
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经过数天摸索,在c++ builder中实现了连接
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2015-1-5 17:38 上传
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mathlink
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