关于在VC++中调用Matlab 中的engine涵数

[zhengqiao]

我用了一个例子,发现在VC++中执行错误, 但不知道如何盖,请指教.
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "engine.h"
//#include "engine.h"
#define BUFSIZE 256

int main()

{
Engine *ep;
mxArray *T = NULL, *result = NULL;
char buffer[BUFSIZE];
double time[10] = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0,
8.0, 9.0};
/*
* Start the MATLAB engine locally by executing the string
* "matlab".
*
* To start the session on a remote host, use the name of
* the host as the string rather than \0.
*
* For more complicated cases, use any string with whitespace,
* and that string will be executed literally to start MATLAB.
*/
if (!(ep = engOpen("\0"))) {
fprintf(stderr, "\nCan't start MATLAB engine\n");
return EXIT_FAILURE;
}

/* /*
* PART I
*
* For the first half of this demonstration, we will send data
* to MATLAB, analyze the data, and plot the result.
*/

/*
* Create a variable for our data.
*/
T = mxCreateDoubleMatrix(1, 10, mxREAL);
memcpy((void *)mxGetPr(T), (void *)time, sizeof(time));

/*
* Place the variable T into the MATLAB workspace.
*/
engPutVariable(ep, "T", T);

/*
* Evaluate a function of time, distance = (1/2)g.*t.^2
* (g is the acceleration due to gravity).
*/
engEvalString(ep, "D = .5.*(-9.8).*T.^2;");

/*
* Plot the result.
*/
engEvalString(ep, "plot(T,D);");
engEvalString(ep, "title('Position vs. Time for a falling
object');");
engEvalString(ep, "xlabel('Time (seconds)');");
engEvalString(ep, "ylabel('Position (meters)');");

/*
* Use fgetc() to make sure that we pause long enough to be
* able to see the plot.
*/
printf("Hit return to continue\n\n");
fgetc(stdin);

/*
* We're done for Part I! Free memory, close MATLAB engine.
*/
printf("Done for Part I.\n");
mxDestroyArray(T);
engEvalString(ep, "close;");

/*
* PART II
*
* For the second half of this demonstration, we will request
* a MATLAB string, which should define a variable X. MATLAB
* will evaluate the string and create the variable. We
* will then recover the variable, and determine its type.
*/

/*
* Use engOutputBuffer to capture MATLAB output, so we can
* echo it back.
*/

engOutputBuffer(ep, buffer, BUFSIZE);
while (result == NULL) {
char str[BUFSIZE];

/*
* Get a string input from the user.
*/
printf("Enter a MATLAB command to evaluate. This command
should\n");
printf("create a variable X. This program will then
determine\n");
printf("what kind of variable you created.\n");
printf("For example: X = 1:5\n");
printf(">> ");

fgets(str, BUFSIZE-1, stdin);

/*
* Evaluate input with engEvalString.
*/
engEvalString(ep, str);

/*
* Echo the output from the command. First two characters
* are always the double prompt (>>).
*/
printf("%s", buffer+2);

/*
* Get result of computation.
*/
printf("\nRetrieving X...\n");
if ((result = engGetVariable(ep,"X")) == NULL)
printf("Oops! You didn't create a variable X.\n\n");
else {
printf("X is class %s\t\n", mxGetClassName(result));
}
}

/*
* We're done! Free memory, close MATLAB engine and exit.
*/
printf("Done!\n");
mxDestroyArray(result);
engClose(ep);

return EXIT_SUCCESS;
}