What is the benefit of terminating if … else if constructs with an else clause?

Question

Our organization has a required coding rule (without any explanation) that:

if … else if constructs should be terminated with an el

Answer 1

Well, my example involves undefined behavior, but sometimes some people try to be fancy and fails hard, take a look:

int a = 0;
bool b = true;
uint8_t* bPtr = (uint8_t*)&b;
*bPtr = 0xCC;
if(b == true)
{
    a += 3;
}
else if(b == false)
{
    a += 5;
}
else
{
    exit(3);
}

You probably would never expect to have bool which is not true nor false, however it may happen. Personally I believe this is problem caused by person who decides to do something fancy, but additional else statement can prevent any further issues.