请问 engEvalString(ep, strEval) 是什么意思

havy

1. CString strEval;
   
2. char buffer[20];
   
3. strEval="i=";
   
4. strEval+=itoa(I,buffer,10);
   
5. strEval+=";";
   
6. engEvalString(ep, strEval);
   
7. strEval="k=";
   
8. strEval+=itoa(K,buffer,10);
   
9. strEval+=";";
   
10. engEvalString(ep, strEval);   
    
11. engEvalString(ep, "cd F:\\lxq1225");
    
12. engEvalString(ep, "[re2,re3,re4]=matr(Mass,Stiff,i,k);"); //i think it is a function

复制代码

请问 engEvalString(ep, strEval); 是什么意思，因为 strEval是一个变量 而不是命令 所以请各位指教。:@L

sogooda

doc engEvalString:


engEvalString


Evaluate expression in string

C Syntax

#include "engine.h"
int engEvalString(Engine *ep, const char *string);



Arguments


ep
   Engine pointer.

string
   String to execute.

Description


engEvalString evaluates the expression contained in string for the MATLAB engine session, ep, previously started by engOpen. It returns a nonzero value if the MATLAB session is no longer running, and zero otherwise.

On UNIX systems, engEvalString sends commands to MATLAB by writing down a pipe connected to the MATLAB stdin. Any output resulting from the command that ordinarily appears on the screen is read back from stdout into the buffer defined by engOutputBuffer. To turn off output buffering, use
engOutputBuffer(ep, NULL, 0);



Under Windows on a PC, engEvalString communicates with MATLAB using a Component Object Model (COM) interface.