-32768 not fitting into a 16 bit signed value

Question

I am using PCLint v 9.00h

In my code I have the following (where S16 is a signed 16 bit):

S16 temperatureResult = -32768;

Which unless

Answer 1

It comes to mind to try:

S16 temperatureResult = (S16) 0x8000; // ASSUMES twos complement integers

The explicit cast is because Rule 10.1 says

"The value of an expression of integer type shall not be implicitly converted to a different underlying type if ..."

Make it portable:

S16 temperatureResult = -32767 - 1;

But anyway, if MISRA requires compatibility with ones complement computers (like some Cray supercomputers), then the guaranteed range of signed 16-bit is only [-32767 ... 32767] so you can't achieve what you're trying to do.