added level 0 battle system

system/battle0.hpp

@@ -0,0 +1,43 @@
+#ifndef _2EASY4ME_BATTLE_SYSTEM_LEVEL0_
+#define _2EASY4ME_BATTLE_SYSTEM_LEVEL0_
+
+#include "../class/monster.hpp"
+#include "../class/player.hpp"
+
+#include <cstdio>
+
+int startBattle(Player *player, Monster *monster)
+{
+    printf(" ===== BATTLE INFO  ===== \n");
+    printf("%15s (Lv.%n):\n", player->getName(), player->getLevel());
+    printf("  HP : %n/%n\n", player->checkHP(), player->getMaxHP());
+    printf("  Att: %n\n", player->getAtt());
+    printf("  Def: %n\n", player->getDef());
+    printf("%15s:\n", monster->getName());
+    printf("  HP : %n/%n\n", monster->checkHP(), monster->getMaxHP());
+    printf("  Att: %n\n", monster->getAtt());
+    printf("  Def: %n\n", monster->getDef());
+
+    printf(" ===== BATTLE START ===== \n");
+    while (player->isAlive() && monster->isAlive())
+    {
+        printf("%15s and %15s attacked each other !!!\n", player->getName(), monster->getName());
+        printf("%15s lose %d HP...\n", player->getName(), player->defend(monster->getAtt()));
+        printf("%15s lose %d HP...\n", monster->getName(), monster->defend(player->getAtt()));
+    }
+
+    printf(" ===== BATTLE  END  ===== \n");
+    if (player->isAlive())
+    {
+        player->restoreHP();
+        printf("YOU WIN !!!\n");
+        return 1;
+    }
+    else
+    {
+        printf("YOU LOSE !!!\n");
+        return 0;
+    }
+}
+
+#endif