An algorithm used to guess digital games

//////////////////////////////////////// //////////////////////////////////////// ///////////////////////////////////////
////
// Software name: Guess 1.0 //
// OPERATOR: owl //
// Time: 2004.10.21 //
// Description: The computer generates any number between four 0-9 records that are not repeated ,//
// After that, it is input by the player. Based on the input, the computer compares two groups of numbers? //
// Provide information similar to xayb. A indicates the number and corresponding position //
// Both are correct. B indicates that the number is correct, but the position is incorrect. //
// Use X and Y to indicate the two conditions. If it is completely correct, "OK" is displayed "//
// If the input is 10 times, the correct result is not returned. Game failure ,//
// The program outputs the base number. //
////
//////////////////////////////////////// //////////////////////////////////////// /////////////////////////////////////
# Include <iostream>
# Include <cstdlib>
# Include <cctype>
# Include <vector>
# Include <algorithm>
Using namespace STD;
Const int vec_size = 4;
Const int err_max = 10;
Int play (void );
Int main (void)
{
Bool stat = true;
Srand (Time (null ));
Cout <"welcome to the guess digital game! "<Endl;
While (STAT = true)
{
Cout <"Press Y to enter the game and press any key to exit :";
Char c = cin. Get ();
If (C = 'y ')
Play ();
Else
Stat = false;
}
System ("pause ");
Return 0;
}
Const vector <int> & rand_data (vector <int> &)
{
For (INT I = 0; I <vec_size; ++ I)
{
Int T = rand () % 10;
If (find (A. Begin (), A. End (), t) = A. End ())
A. push_back (t );
Else
-- I;
}
Return;
}
Bool counter (const vector <int> &,
Const vector <int> & V)
{
Int x = 0, y = 0;

For (INT I = 0; I <vec_size; ++ I)
For (Int J = 0; j <vec_size; ++ J)
{
If (V [I] = A [J])
If (I = J)
X ++;
Else
Y ++;
}
If (x = vec_size)
Return true;

Cout <x <"A" <Y <"B" <Endl;
Return false;
}
Bool isdigit (int elem)
{
Char c = '0 ';
Const int step = C-0;
Return isdigit (ELEM + step );
}
Const vector <int> & in (vector <int> & V)
{
Cout <"Enter four numbers that are not repeated (0-9) and separate them with spaces! "
<Endl;
For (INT I = 0; I <vec_size; ++ I)
Cin> V [I];
For (INT I = 0; I <vec_size; ++ I)
{
If (isdigit (V [I]) = false)
{
Cerr <"must be a number between 0 and 9! Enter"
<I + 1
<"Digit :";
Cin> V [I];
}
For (Int J = 0; j <vec_size; ++ J)
If (V [I] = V [J] & I! = J)
{
Cerr <"error. Please enter"
<I + 1
<"Number! "
<Endl;
Cin> V [I];
-- I;
}
}
Return V;
}
Void out (vector <int> & A, bool Stat)
{
If (STAT = false)
{
Cout <"you lost. The base number for this operation is :";
For (size_t I = 0; I <A. Size (); ++ I)
Cout <A [I] <"";
Cout <Endl;
Cout <"Try again ~! "<Endl;
}
Else
Cout <"OK !!! Congratulations! "<Endl;

}
Int play (void)
{
Vector <int>;
Vector <int> V (vec_size );
Bool stat = false;
Rand_data ();
For (INT I = 0; I <err_max; ++ I)
{
In (v );
If (STAT = counter (A, V ))
Break;
}
Out (A, STAT );
Return 0;
}