I am having trouble with writing a tic tac toe program. My code executes just fine if the first move results in a win. If it doesn't the code just stops. It doesn't finish but it does not continue to run. Can someone help? Must start with the game board already at:
- x o
- - -
o - -
Here is my code:
#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
int winner(char tic[][3],int size, bool& finished);
//determines winner.
void currentGame(char tic[][3], int size);
//inputs current game board.
void displayGame(char tic[][3],int size);
//displays current game board.
void opponentPlay(char tic[][3], int size);
//human's move.
void nextPlay(char tic[][3], int size);
//computer's move.
unsigned int pseudoRand (unsigned int prime);
//generates random computer move.
int main()
{
int i,j;
char tic[3][3];
bool finished=false;
currentGame(tic,9);
cout<<"Welcome to Tic Tac Toe. I will be O'x, you can be X's. You may play first."<<endl;
while(finished!=true)
{
bool keep_playing=false;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
if(tic[i][j]=='-')
{
bool keep_playing=true;
}
}
}
if(keep_playing=true)
{
opponentPlay(tic,9);
winner(tic,9,finished);
nextPlay(tic,9);
winner(tic,9,finished);
}
else
cout<<"The game ends in a draw."<<endl;
}
return 0;
}
void currentGame(char tic[][3], int size)
{
int i,j;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<"Enter current game board. ";
cin>>tic[i][j];
}
}
}
void displayGame(char tic[][3],int size)
{
int i,j;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<tic[i][j]<<" ";
}
cout<<endl;
}
cout<<endl;
}
void opponentPlay(char tic[][3], int size)
{
int i,j;
displayGame(tic,9);
cout<<"Enter the row and column you wish to play in (0-2): "<<endl;
cin>>i>>j;
if(i<0||i>2||j<0||j>2)
{
cout<<"Invalid move"<<endl;
cin>>i>>j;
}
while(tic[i][j]!='-')
{
cout<<"Already taken."<<endl;
cin>>i>>j;
}
tic[i][j]='x';
displayGame(tic,9);
}
int winner(char tic[][3],int size, bool &finished)
{
int i;
char x,o;
//Check row win for X.
for(i=0;i<3;i++)
{
if((tic[i][0]==tic[i][1]) && (tic[i][0]==tic[i][2]) && (tic[i][0]=='x'))
{
cout<<"Congratulations! You win!"<<endl;
finished=true;
}
}
//Check row win for O.
for(i=0;i<3;i++)
{
if((tic[i][0]==tic[i][1]) && (tic[i][0]==tic[i][2]) && (tic[i][0]=='o'))
{
cout<<"I win, nice try!"<<endl;
finished=true;
}
}
//Check column win for X.
for(i=0;i<3;i++)
{
if((tic[0][i]==tic[1][i]) && (tic[0][i]==tic[2][i]) && (tic[0][i]=='x'))
{
cout<<"Congratulations! You win!"<<endl;
finished=true;
}
}
//Check column win for O.
for(i=0;i<3;i++)
{
if((tic[0][i]==tic[1][i]) && (tic[0][i]==tic[2][i]) && (tic[0][i]=='o'))
{
cout<<"I win, nice try."<<endl;
finished=true;
}
}
//Check diagonal win for X.
if((tic[0][0]==tic[1][1]) && (tic[0][0]==tic[2][2]) && (tic[0][0]=='x'))
{
cout<<"Congratulations! You win!"<<endl;
finished=true;
}
if((tic[0][2]==tic[1][1]) && (tic[0][2]==tic[2][0]) && (tic[0][2]=='x'))
{
cout<<"Congratulations! You win!"<<endl;
finished=true;
}
//Check diagonal win for O.
if((tic[0][0]==tic[1][1]) && (tic[0][0]==tic[2][2]) && (tic[0][0]=='o'))
{
cout<<"I win, nice try."<<endl;
finished=true;
}
if((tic[0][2]==tic[1][1]) && (tic[0][2]==tic[2][0]) && (tic[0][2]=='o'))
{
cout<<"I win, nice try."<<endl;
finished=true;
}
return finished;
}
unsigned int pseudoRand (unsigned int prime)
{
unsigned int a=22695477,c=1,next;
next=(a*prime)+c;
next=next%3;
return next;
}
void nextPlay(char tic[][3], int size)
{
int i,j,numI=75,numJ=18;
while(tic[i][j]!='-')
{
i=pseudoRand(numI);
j=pseudoRand(numJ);
}
cout<<"I will play row "<<i<<" and column "<<j<<"."<<endl;
tic[i][j]='o';
displayGame(tic,9);
}
