fix: use constant to manage episode number

Makefile

@@ -1,5 +1,5 @@
 all: a.out
-a.out: main.c
+a.out: main.c enviroment.c enviroment.h q-learning.c q-learning.h constant.h
 	gcc main.c enviroment.c q-learning.c -lm
 run:
 	./a.out

main.c

@@ -14,6 +14,6 @@ int main(){
     init_table(&table[0][0]);
 
     run(&table[0][0], board, false, 10000, false);
-    run(&table[0][0], board, true, 1000000, false);
+    run(&table[0][0], board, true, EPISODE_NUM, false);
     run(&table[0][0], board, false, 10000, false);
 }