C++ mathematical issue - c++

Question

So on my final project, a black jack and poker simulator using inheritance from a cards class, we have to keep track of the user's bet and total Money. However, in my code, it does very strange things. For example: if your total money was 1000000000 dollars and you bet 100 and won back 200 your new total money is now equal to 199 dollars
My program goes back and forth from doing this, and not doing this. It's maddening and I don't know why it's happening. The following is my main function, and my two functions that handle each poker game. If anyone thinks more code is needed to answer, though I'll gladly include class headers and implementation files. Thanks to all who may help! The following is my main functions, and the two functions to handle each game:
unsigned int handlePoker(unsigned int);
unsigned int handleBlackJack(unsigned int);
//main function:
//asks the user what game they want to play
//then calls a function for the appropriate
//game chosen
int main()
{//two choices:
//one for quitting the program
//the other for whichever game they want
char yesOrNo;
char choice;
unsigned int totalMoney;
cout<< "please enter a starting amount to bet with"<<endl;
cin>>totalMoney;
cout<<"would you like to play?"<<endl;
cout<<"enter 'y' for yes and 'n' for no"<<endl;
cin>>yesOrNo;
do{
//ask the user which game they want
cout<<"would you like to play poker or black jack?"<<endl;
cout<<"input '1' for poker and '0' for blackjack"<<endl;
cin>>choice;
if(choice == '1')
{
totalMoney = handlePoker(totalMoney);
}//end if
else if(choice == '0')
{
totalMoney = handleBlackJack(totalMoney);
}//end else if
else
{
cout<<"I'm sorry, the input you entered was invalid"<<endl;
cout<<"please try again"<<endl;
cin.clear();
}//end else
cout<<"would you like to try again?"<<endl;
cout<<"('y' for yes, or 'n' for no)"<<endl<<endl;
cin>>yesOrNo;
}while(yesOrNo == 'y' || yesOrNo == 'Y'); //end do while loop
return 0;
}//end int main
//handle poker:
//a void function which takes an
//unsigned integer value
//the function declares a "poker" object
//and uses it's void functions to sim a poker game
unsigned int handlePoker(unsigned int tot)
{
unsigned int multiply;
unsigned int betMonies;
unsigned int win;
poker round;
cout<<"how much do you want to bet?"<<endl;
cin>>betMonies;
//if the bet money entered was valid
// we begin playing
if(betMonies < tot)
{//big if begin
//ask if they want a better hand
round.betterHand();
//set the number we multiply your money by
multiply = round.rewardMoney();
//if multiply is 0
//then the user has lost this hand
//we inform them as such, and subtract
//their bet money from their total money
if(multiply == 0)
{
cout<<"I apologize, but you seem to have lost"<<endl;
cout<<"when you lose, your bet is subtracted"<<endl;
cout<<"your initial balance was: "<<tot<<endl;
//decrement the total
tot = (tot - betMonies);
cout<<"your new balance is: "<<tot<<endl;
}//end if
//if multiply is not 0 (assuming it's not negative
//because there's no way it could be)
//we tell them what they've won, and add it to
//their total money
else
{
win = (multiply*betMonies);
cout<<"your initial balance was: "<<tot<<endl;
cout<<"your win was"<<win<<endl;
//increment the total
tot = (win + tot);
cout<<"your new balance is "<<tot<<endl;
}//end else
}//big if end
//if the amount entered was not valid
//simply tell them, then run the loop again
else
{//else begin
cout<<"I'm sorry, that was not a valid amount of money"<<endl;
cout<<"please try again"<<endl;
}//end else
round.shuffleDeck();
return tot;
}//end handlePoker
//handle Black jack:
//a function returning an unsigned int
//that keeps track of the total money
//declares a black jack object
//and uses it's member functions to play black jack
unsigned int handleBlackJack(unsigned int tot)
{
blackJack play;
unsigned int reward;
unsigned int betMoolah;
//ask the user for the bet they want
cout<<"how much do you want to bet?"<<endl;
cin>>betMoolah;
//if the bet is less than the total passed by reference
//then we can start running the game
if(betMoolah < tot)
{
//print the hands dealt in the constructor
play.printHands();
//run the function that lets them hit or stay
//the function contains a do while loop
// so, no looping is required
play.hitOrStay();
//we then handle the reward
//which returns an integer type
reward = play.handleReward(betMoolah);
//prints dealer and player's hands fully
play.printHandGame();
//in one of the cases, reward is set to -1
//we use this here:
if(reward < 0 )
{
//if the reward is negative, then
//we subtract the bet money
//then we tell the user their new balance
cout<<"your balance was "<<tot<<endl;
cout<<"you have lost, so your bet is subtracted"<<endl;
tot = (tot-betMoolah);
cout<<"your new balance is: "<<tot<<endl;
}//end if
//if the reward is above 0, then we add the reward to the total
else if(reward > 0)
{
cout<<"your original balance was "<<tot<<endl;
cout<<"your winnings are: "<< reward<<endl;
tot = reward + tot;
cout<<"your new balance is: "<<tot<<endl;
}//end else
else
{
cout<<"you have lost no money"<<endl;
cout<<"your balance is still " <<tot<<endl;
}
}//end of the big if
//if the amount of money entered is above total money
//then the money entered isn't valid at all
else
{
cout<<"the amount of money you've entered is not valid"<<endl;
cout<<"please try again"<<endl;
}// end else
play.shuffleDeck();
return tot;
}//end handleBlackJack

Answer 1

I can't fully explain what your seeing, but I did notice a liberal use of unsigned int. In particular, in handleBlackJack you have:
unsigned int reward;
and then
reward = play.handleReward(betMoolah);
and finally
if(reward < 0 )
If reward can be negative, it shouldn't be an unsigned int. As others have suggested, step through it in a debugger and "follow the money".