refactoring: Changed name of function charIsUp to characterIsUpperCase() and inner variable in order to increase readability.

src/helperFunctions.c

@@ -137,8 +137,9 @@ double balanceToDouble(char *balanceAsString)
 	}
 	return sign * result / power;
 }
-bool charIsUp(char c)
+
+bool characterIsUpperCase(char inputCharacter)
 {
-	bool result = (c>='A'&&c<='Z') ? true : false;
+	bool result = (inputCharacter>='A'&&inputCharacter<='Z') ? true : false;
 	return result;
 }

src/helperFunctions.h

@@ -13,5 +13,5 @@ unsigned int power(unsigned int, unsigned int);
 bool everyCharacterIsDigit(char *);
 bool isLetterOfAlphabet(char *);
 double balanceToDouble(char *);
-bool charIsUp(char );
+bool charIsUpperCase(char );
 #endif