adding cs142 code

cs142/lab10/archer.cpp

@@ -0,0 +1,21 @@
+#include "archer.h"
+archer::archer(string name, int max_hp, int strength, int speed, int magic) :
+    fighter(name, max_hp, strength, speed, magic), original_speed(speed) {}
+
+int archer::getDamage() {
+    return speed;
+}
+
+void archer::reset() {
+    hp = max_hp;
+    speed = original_speed;
+}
+
+bool archer::useAbility() {
+    speed++;
+    return true;
+}
+
+int archer::get_original_speed() {
+    return original_speed;
+}