CHAR Compare is right, even when it's wrong - c++

Question

first im new at c++ programming and at the moment im stuck in a maybe very easy problem.
I thought, after get the other stuff working and in my oppinion, much harder, i will implement a little string compare and im are ready, ha ha...
I tryed to figure out what is the problem and working on it since hours...
I try to make a string compare.
With serial print i see the correct letters. For Example i compare "A" and "B".
My Problem is, that this compare is right, even when it's wrong.
bool debug = true;
void setup() {
// put your setup code here, to run once:
if (debug) { Serial.begin(9600); }; // Initialize serial communications with the PC
}
void loop() {
int result;
char myWord[6] = "#VOGEL";
char wordBuff[5];
char wordLetter;
char letterBuff;
// I do this here, because actually i get all values from two RFID Reader
strncpy( wordBuff, &myWord[1], 5 );
wordBuff[5] = '\0';
for (int fieldNr = 0; fieldNr < 5; fieldNr++)
{
wordLetter = wordBuff[fieldNr];
letterBuff = 'L';
result = strcmp(letterBuff,wordLetter); // Should be every time wrong? But it is sometimes true?
if ( result == 0)
{
if(debug){ Serial.print(F("Right Field: "));Serial.println(fieldNr);
Serial.print(F(" LetterA: "));Serial.print(wordLetter);Serial.println(F("#"));
Serial.print(F(" LetterB: "));Serial.print(letterBuff);Serial.println(F("#"));}
}
else
{
if(debug){ Serial.print(F("Wrong Field: "));Serial.println(fieldNr);
Serial.print(F(" LetterA: "));Serial.print(wordLetter);Serial.println(F("#"));
Serial.print(F(" LetterB: "));Serial.print(letterBuff);Serial.println(F("#"));}
}
}
delay(1000); //NUR für TESTZWECKE
}

Answer 1

strcmp is only for const char *, not a single char like you are using it.
I don't remember if Arduino permits you to use the std::string but in case just use it.
It introduce you lot more methods for string handling. Like s.find(c) that return directly the position of the char in the string.
By the way, to compare 2 char, in your example, just use a simple:
if(c1 == c2)
...
else
...
It should solve it.