修复类型输入错误导致的bug

修复打印格式问题

CosmeticManager.cpp

@@ -104,11 +104,11 @@ void CosmeticManager::displayAll() const {
     }
 }
 // 查找临期化妆品，小于60天
-void CosmeticManager::displayExpiringCosmetics() const {
+void CosmeticManager::displayExpiringCosmetics(int days=60) const {
     std::string date = Cosmetic::getTime();
     for (int i = 0; i < count; ++i) {
         //这里可以调整判定临期的时间（天）
-        if (cosmetics[i]->getExpirationDate() < Cosmetic::getTimeAdd(60)) {
+        if (cosmetics[i]->getExpirationDate() < Cosmetic::getTimeAdd(days)) {
             std::cout << "品牌: " << cosmetics[i]->getName()
                       << " | 过期日期: " << cosmetics[i]->getExpirationDate()
                       << std::endl;