Showing Matlab output command on Visual Studio using Matlab Engine

I use Matlab engine to run below matlab script on Visual Studio.

% test.m
for i=1:30
   fprintf('i = %d\n', i);    
end

How can I show the output continuously on Visual Studio?

//engdemo.cpp
#define  BUFSIZE 256
int main()
{
  // ...
  Engine *ep;
  char buffer[BUFSIZE+1];
  buffer[BUFSIZE] = '\0';
  engOutputBuffer(ep, buffer, BUFSIZE);
  engEvalString(ep, "test");
  while (1) {
    printf("%s", buffer);  // ???
  }
  // ...
}