🚀 go-pugleaf

I am not sure that this is the right group but here goes. 
I am writing a TSR using C++ (borland's) and are having trouble with the
printf statement. I am outputing integer variables to the screen and
need a printf("%i",x) etc statement. The problem is that it crashes at
the point of output each time. I have tryed a "cputs" to test the
problem and this works fine, however any printf statement will crash the
machine.
As background, the TSR I mentioned makes a clock tick on the screen
while using DOS.
Any suggestions, advice??
Thanks in advance,
Rob.