Output from system command is always empty.

I am running a compiled C++ executable from the system command:

[status,cmdout] = system("executable.exe");

As a test, I made the executable print only a single word or number to stdout, but the system command never catches it in cmdout. The status returned is always zero and I can run the executable myself in PowerShell or Command Prompt and it works fine there. If I append an "echo" command to the system command:

[status,cmdout] = system("executable.exe && echo banana");

the result is

cmdout = 'banana'

I'm not sure what else to look at, so any help is appreciated!

Answer 1

[Hari Krishna Ravuri]

I understand that you are not getting the console output of the .exe file which was generated by compiling a C++ program in the cmdout in your MATLAB script. I just tried a small example and as expected this happened.

#include<iostream> 
int main(){ 
 
 
std::cout<<"a"; 
return 0; 
} 

I compiled and got the exe file and it was named as “a.exe”. Now I executed your script in MATLAB

[status,cmdout] = system("a.exe&&echo banana")

status = 
  
     0 
  
  
cmdout = 
  
    'abanana 
     ' 

I suggest you check the C++ source code for which you are generating the .exe file. The status will be 0, if the execution of the command by OS exits without any error. Please refer https://www.mathworks.com/help/matlab/ref/system.html#btnrzs7-1_sep_shared-status for more information.