VC调用matlab,实参怎么传递?

E02610229

我用matlab编写了computfft.m文件,然后将它生成了.dll文件,想用VC来调用,请问怎么给它赋实参.在
function [offset,flag]=computfft(source,sample,slength)中,source和sample是一个二唯矩阵,slength是int型,然后返回的参数offset,flag是double

AaronSpark

一个例子，由此例提请注意的是：
1. matlab中的数组下标从1开始；
2. maltab中的数据及时与VC中同名也并非同一个存储空间；
3. 学会应用各种传入传出函数

1. #include <stdlib.h>
   
2. #include <stdio.h>
   
3. #include <string.h>
   
4. #include "engine.h"
   
5. int transs(double z1,double z2,double z3) ;
   
6. #define BUFSIZE 256
   
7. void main()
   
8. {
   
9. double z1=2;
   
10. double z2=3;
    
11. double z3=7;
    
12. printf("z1=%f,z2=%f,z3=%f\n",z1,z2,z3);
    
13. system("pause");
    
14. transs(z1,z2,z3);
    
15. }
    
16. 
    
17. int transs(double z1,double z2,double z3)
    
18. {
    
19. Engine *ep;
    
20. 
    
21. mxArray *z_ptr,*result=NULL;
    
22. mxArray *z4_ptr;
    
23. double *z4;
    
24. double z[3];
    
25. z[0]=z1;
    
26. z[1]=z2;
    
27. z[2]=z3;
    
28. if(!(ep=engOpen("{followups.content}")))
    
29. {
    
30. fprintf(stderr,"\nCan't start MATLAB engine\n");
    
31. return EXIT_FAILURE;
    
32. }
    
33. z_ptr=mxCreateDoubleMatrix(1,3,mxREAL);
    
34. z4_ptr=mxCreateDoubleMatrix(1,2,mxREAL);
    
35. memcpy((void *)mxGetPr(z_ptr),(void *)z,sizeof(z));
    
36. printf("z_ptr=%f\n",z_ptr);
    
37. engPutVariable(ep,"z_ptr",z_ptr);
    
38. printf("z_ptr=%f\n",z_ptr);
    
39. engEvalString(ep,"x1=z_ptr(1,1)");
    
40. engEvalString(ep,"x2=z_ptr(1,2);");
    
41. engEvalString(ep,"x3=z_ptr(1,3)");
    
42. engEvalString(ep,"n1=[x1 x2];");
    
43. engEvalString(ep,"d1=[x1 x2 x3];");
    
44. engEvalString(ep,"[y,x,t]=step(n1,d1);");
    
45. engEvalString(ep,"z4_ptr=max(y);");
    
46. z4_ptr=engGetVariable(ep,"z4_ptr");
    
47. z4=mxGetPr(z4_ptr);
    
48. printf("z4=%f\n",*z4);
    
49. mxDestroyArray(z_ptr);
    
50. mxDestroyArray(z4_ptr);
    
51. engClose(ep);
    
52. return 1;
    
53. }

复制代码

wahaha_2002

好，谢谢！