screenResOsx01.cpp

#include <iostream>
#include <CoreGraphics/CGContext.h>
#include <CoreGraphics/CGError.h>
#include <CoreGraphics/CGGeometry.h>

int main(void)
{
  int x=0, y=0;

  x = CGDisplayPixelsWide(CGDirectDisplayID());
  y = CGDisplayPixelsHigh(CGDirectDisplayID());
  std::cout<<"x : "<<x<<std::endl;
  std::cout<<"y : "<<y<<std::endl;

  return 0;
}

//g++ -isysroot /Developer/SDKs/MacOSX10.6.sdk -o testScreenres main.cpp && ./testScreenres