fix modify hp calc

.gitignore

@@ -1,2 +1,3 @@
 cmake-*
 .idea/
+build/

main.cpp

@@ -13,6 +13,7 @@
 #include "FoodObject.h"
 #include <fstream>
 #include <sstream>
+#include <time.h>
 
 using std::string;
 using std::unique_ptr;
@@ -212,6 +213,7 @@ std::vector<std::string> split(const std::string &str) {
  */
 void gameLoop() {
     bool gameOver = false;
+    auto prev_time = time(nullptr);
     while (!gameOver) {
         /* Ask for a command. */
         bool commandOk = false;
@@ -379,11 +381,15 @@ void gameLoop() {
         if (!commandOk) {
             wrapOut(&badCommand);
             wrapEndPara();
-        } else {
-            currentState->setHP(currentState->getHP() - 1);
-            gameOver = gameOver && (currentState->getHP() <= 0);
         }
 
+        auto now = time(nullptr);
+        if (now - prev_time > 60) {
+            int hp_offset = (now - prev_time) / 60;
+            prev_time += hp_offset * 60;
+            currentState->setHP(currentState->getHP() - hp_offset);
+        }
+        gameOver = gameOver || (currentState->getHP() <= 0);
     }
 }
 
@@ -395,4 +401,4 @@ int main() {
     currentState->announceLoc();
     gameLoop();
     return 0;
-}
+}