add src

src/functions.h

@@ -0,0 +1,12 @@
+#ifndef FUNCTIONS_H
+#define FUNCTIONS_H
+
+#define LIFES 8
+
+char choose_letter();
+int word_size(const char *fullWord);
+int letter_occurrence(char letter, const char *fullWord);
+void position_letter(char letter, const char *fullWord, char *partialWord);
+int has_won(const char *fullWord, const char *partialWord);
+
+#endif