#include <windows.h>
#include <cstdio>
 
bool es64bits()
{
	typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS)(HANDLE, PBOOL);
	BOOL bIs64BitOS = false;
	LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(GetModuleHandle("kernel32"), "IsWow64Process");
	if (fnIsWow64Process)
	{
		fnIsWow64Process(GetCurrentProcess(), &bIs64BitOS);        
	}
	return bIs64BitOS;
}
 
void main()
{
	printf("%d\r\n", es64bits());
}