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while(!gamewon)
{
if(hold2 != -1)
{
if(player == 15) //PLAYER
{
std::cout<<"player drop where?";
player = 254;
}
else //COMPUTER
{
player = 15;
}
}
while(true)
{
if(charsPlaced == 42) break;//if draw
if (player == 15)
{
moves.clear();
hold=0;
value=0;
double prevValue=-MAX_RECURDEPTH-1;
for(int x=0; x<WIDTH; x++)
{
if(colH[x]>=HEIGHT)
continue;
if (move==0)
{
moves.push_back(3);
break;
}
if(player==15 && move==1)
{
moves.push_back(3);
break;
}
value=AB_minmax(player, recurDepth,x, a,b);
if(value>prevValue)
{
moves.clear();
prevValue=value;
}
if(value==prevValue)
{
moves.push_back(x);
}
}
move++;
std::cout<<"VAlue:";
std::cout<<(prevValue++);
if(moves.size()>0)
{
std::random_shuffle( moves.begin(), moves.end() );
hold=moves.at(0);
}
if(moves.size()==0)
{
cout<<"Its a draw.";
break;
}
}
else
std::cin>>hold;//get user input
hold--;//take off 1 to account for arrays starting at 0 not 1
if(hold <=6 && hold>= 0) break;//if within valid range stop loop
else
std::cout<< "\nplease enter a value between 1 and 7 :";//ask for input and loop again
if (cin.fail()) //catch a non number
{ //
cin.clear(); //Stops cin trying to put its value in to hold
char c; //Try entering a non number without this, 2 see what this does
cin>>c; //
} //Catch a non number
}
if(charsPlaced == 42) break;//if draw
hold2 = drop(hold,player);
if(hold2 == -1)
std::cout<<"Column is full\nPlease enter another number between 1 and 7:";//if error -1 row is full
else
{
gamewon = won(place,hold2,hold);
charsPlaced ++;
system("cls");
display();
}
}
system("cls");
if(charsPlaced == 42)
{
std::cout<<"No winner, Game was draw\n";
system("pause");
return 0;
}
if(player == 15)//if won by player 2
std::cout<<"gamewon by : computer\n";
else
std::cout<<"gamewon by : player\n";//Else won by player 1
system("pause");//pauses before exit so players can see who won, works with windows
return 0;//Exit application
}
void display()
{
cout<<" 0 1 2 3 4 5 6\n";
for(int i=0; i<= 5; i++)
{
for(int j=0; j<=6; j++) cout<<char(218)<<char(196)<<char(191)<<" ";
cout<<'\n';
for(int j=0; j<= 6; j++) cout<<char(179)<<place[i][j]<<char(179)<<" ";
cout<<'\n';
for(int j=0; j<= 6; j++) cout<<char(192)<<char(196)<<char(217)<<" ";
cout<<'\n';
}
}
int drop(int b, char player) {
if(b >=0 && b<= 6)
{
if(place[0][b] == ' ')
{
int i;
for(i = 0;place[i][b] == ' ';i++)
if(i == 5)
{
place[i][b] = player;
return i;
}
i--;
place[i][b] =player;
return i;
}
else
{
return -1;
}
}
else
{
return -1;
}
}
double AB_minmax(int player, int hold,int recurDepth,double a,double b)
{
int pp;
double value=0,val=0;
if(colH[hold]>=HEIGHT)
return 0;
recurDepth++;
place[hold][colH[hold]]=player;
colH[hold]++;
if(colH[hold]>=HEIGHT)
return 0;
if(won(place,hold,colH[hold])>0)
{
if(player==15)
{value=MAX_RECURDEPTH+1-recurDepth;}
else {value=-MAX_RECURDEPTH-1+recurDepth;}
}
if(player==15)
{
for (int i=0, r=recurDepth; i < WIDTH && r <= MAX_RECURDEPTH; i++,r++)
{
if (player==15) (pp=254);
else (pp=15);
val=AB_minmax(pp,i,(r+1),a,b);
if(val<b)
{
b=val;
break;
}
}
return b;
int r=recurDepth;
while((r<=MAX_RECURDEPTH) && (i<WIDTH)
{
val=AB_minmax(3-player,i,(r+1),a,b);
if(val<b)
{
b=val;
break;
}
i++;
r++;
}
return b;*/
}
if(player==254)
{
for(int x=0; (x<WIDTH && recurDepth<=MAX_RECURDEPTH);hold++,recurDepth++)
{
if (player==15) (pp=254);
else (pp=15);
val=AB_minmax(3-player,hold,(recurDepth+1),a,b);
if(val>a)
{
a=val;
break;
}
}
return a;
}
value=val;
recurDepth--;
colH[hold]--;
place[hold][colH[hold]]=' ';
return value;
}
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