unsigned becomes signed in if-statement comparisons?

Question

I have searched this site for an answer and found many responses to unsigned/signed comparison but this problem is that only unsigned parameters are compared but still it wo

Answer 1

In the expression:

if( (u16_varLow - u16_varHigh) > (unsigned short)5 )  

(u16_varLow - u16_varHigh) will be promoted to an int and evaluate to -65525. The fix for your problem is to cast to an unsigned type, like you do in the "Does enter"-code.

The reason s16_Res1 = u16_varLow - u16_varHigh; yields 11 is that the result of the subtraction, -65525, doesn't fit in a short.