Looping from user to computer

[ccPac014]

Hi everyone,

I had a question concerning looping between the user and the computer.

My assignment for a class project is to have input from the user, switch to the computer, and then switch back to the user, and so on and so forth.

Would I need to use a do-while loop?

Thank you!

[Tytrin]

I'm sorry but what?

Request input from user is simply
cout <<'Request>> ";
cin >> variable;

but what do you mean switch back to the computer? How is the computer supposed to generate an input?

But as far as do-while, I would reccommend using this only if you are certain that the code you are including inside the do needs to be executed at least once in all cases.

[ccPac014]

The game allows a human to play against the computer.
I have to code to receive input from the human and then randomize numbers for the computer.

How would I code for the game to switch from the human to the computer?


For example:

(the game would go like this):

Welcome!

group A: 15 group B:25

human
"Which group would you like to take from?" A
"How many items would you like to take from the group? 3

group A: 12 group B:25

computer
"Computer removes 4 items from group B."

group A: 12 group B:21

human...
etc...

I hope you understand what I mean.

[Gaminic]

If every human action is followed by an action by the computer, simply put them both sequentially in your loop:

while (!stop) {
  // Human actions

  // Computer actions
}

However, if that guarantee is not given (e.g. the game can quit after the human player's turn, thus skipping the computer's turn), you can use a control variable:

bool human_turn = true; // Human player begins
while (!stop) {
  if (human_turn) {
    // Human actions
  }
  else {
    // Computer actions
  }
  human_turn = !human_turn;
}

[Tytrin]

I see. That makes more sense.

So I presume you are allowed to use rand() right?

would the following eaxmple work?

do{
      cout <<"Group? >>"
      cin >> grpSel // a char varaible
      cout << "How many?>> "
      cin >> takeSel // an int variable
/*
An if else conditional to take 'takeSel' from selected group
*/

// computer part
srand(time(NULL)); // seed the RNG with current time from Jan 1 1970, different on each                         
                               //   execution.
int rng1=rand()%100;
int rng2= rand()%3 // or any other type of operation you like
if (rng1>=50) { grpSel=='B' // or A your choice};
else {grpSel=='A' // or v.v.}
/* Some modifier of rng2 to get a number between 0 and the max you want the computer to take and then the following operations for the taken numbers */

// change of the terminating test here. [i.e. sentinel value not reached etc.]

}while('terminating test')// the test need be included so that the game stops when the 
                                       // conditions you define are reached 

[ccPac014]

@ Gaminic:

so is "!stop" a variable??



while (!stop) {
// Human actions

// Computer actions
}

[Tytrin]

stop is a boolian variable initialized to false. You would need a statement in the while loop to check it after each turn, to see if the stop condition is reached. the ! is the not operator and produces the opposite of the variable inquestion[ i.e. if var=true then !var = false, if var=false then !var=true]

[in case you need it ->
declaring stop:
bool stop=false; ]