If you want to output debug messages in your output console in Visual studio, you can do it in two ways:

  1. Use standard C++ output stream cout
    cout<<"Your Message"<<endl;
  2. use the Marmalade  s3eDebug module: first include the header: 
    #include "s3eDebug.h"
    then 
    s3eDebugOutputString("Your Message");
    to display integers you have to convert them to C style strings first: 
    int x=10;
char buffer[10];
//convert the int to a char array
sprintf(buffer,"%d",x);
s3eDebugOutputString(buffer);