C / C++ / MFC

class AccountInfo 
{
private:
   float balance;
   string accountName;
   CCriticalSection balanceCode;
   CSingleLock *balanceLock;

public:
   AccountInfo(const string &name) : 
      balance(0.0), accountName(name)
   {
      balanceLock = new 
         CSingleLock(&balanceCode, 
         false);
   }

   ~AccountInfo() { 
   delete balanceLock;
   }

   void deposit(float amount) {
      
      balanceLock->Lock();
      balance +=   amount;
      balanceLock->Unlock();
   }

   void withdraw(float 
      amount) {
      balanceLock->Lock();
      balance -= amount;
      balanceLock->Unlock();
   }
   float getBalance() const {
      balanceLock->Lock();
      float val = balance;
      balanceLock->Unlock();
      return val;
   }
};