move algorithm to own file

include/generator.h

@@ -0,0 +1,31 @@
+#include <stdint.h>
+#include <string.h>
+#include "main.h"
+#include "students.h"
+#include "courses.h"
+
+#ifndef GENERATOR_H_INCLUDED
+#define GENERATOR_H_INCLUDED
+
+const char FLEX[2][11] = {"XAT--12A-S", "XAT--12B-S"};
+
+typedef struct {
+  uint8_t numberOfClasses;
+  char classes[CLASSROOMS][MAX_COURSE_ID_LEN];
+} TIMETABLE_BLOCK;
+
+typedef struct {
+  TIMETABLE_BLOCK timetable[TOTAL_BLOCKS];
+  bool success;
+} TIMETABLE;
+
+typedef enum {
+  FirstToSecondSemester,
+  SecondToFirstSemester
+} StepType;
+
+TIMETABLE generateTimetable(STUDENT *students, size_t size_students, COURSE *courses, size_t size_courses);
+
+bool isFlex(char crsNo[MAX_COURSE_NO_LEN]);
+
+#endif