Question

I am generating a random number and checking if the character contained is a certain character (i.e. 0xDB). This doesn’t seem to be the correct way to do it as it seems like my if() is always false and goes to else.

How can I achieve this? Code below. Thanks!

if(buffer[randomNumber] == 0xDB) 
    count++;
else {
    buffer[randomNumber] = 0xDB;
    arrayChangeFlag++;
    count++;
}

Answer 1

What is the type of buffer?

I guess that it is either signed char or implicitly-signed char. The range of a signed char in most implementations is (-128,+127). 0xDB is outside that range, so that equality test might never be true.

Try changing the type of buffer to unsigned char, or replacing your test with:

 if((unsigned char)buffer[randomNumber] == 0xDB) 

or

 if(buffer[randomNumber] == (char)0xDB)