Write a C program where two values are compared to third value and nearest value is returned?

Question

a and b are compared against
the threshold ‘TH’, and the nearest value is voted as output

Answer 1

int compare (int a, int b, int th) 
{
  if (abs(th - a) > abs(th-b))
    return b;
  else
    return a;
}

if a and b both are at the same distance from th then a is returned.