Write a running code in any language to implement the famous tic-tac-toe game.
Decide which basic functions which would be required to implement the same.
Decide which basic functions which would be required to implement the same.
Then try to code it your self else basic code is given. below
1) Game has 3 modes: Human Vs Human, Human Vs Computer and Computer Vs Computer.
2) Initially start with 3X3 grid, but it can be generalized to NXN grid. So don’t hard-code any variable.
3) Minimize Code Redundancy and try to make it as modular as possible.
4) Try to use abstraction and expose lesser number of functions(APIs) to outside world.
5) Try to cover maximum number of edge cases, like when to abort the game, draw condition, win condition, overwriting existing value in grid etc)
Currently I have implemented with conditions from above
1),3),4),5)
-Trying to make it for NXN, if some one can comeup with that please ping below.
Thanks Dhaval for providing code :
Code :
#include <stdio.h>
#include <stdlib.h>
#define gc getchar_unlocked
inline int scan(){register int n=0,c=gc();while(c<'0'||c>'9')c=gc();while(c<='9'&&c>='0')n=(n<<1)+(n<<3)+c-'0',c=gc();return n;}
char matrix[3][3]; /* the tic tac toe matrix */
char check(void);
void init_matrix(void);
void get_player_move(int);
void get_computer_move(int);
void disp_matrix(void);
int main(void)
{
int choice;
char done;
printf(" 1 - Human Vs Human\n 2 - Human Vs Computer \n 3- Comp Vs Comp \n");
choice = scan();
done = ' ';
init_matrix();
do {
disp_matrix();
get_player_move(choice);
done = check(); /* see if winner */
if(done!= ' ') break; /* winner!*/
get_computer_move(choice);
done = check(); /* see if winner */
}while(done== ' ');
if(done=='X') {disp_matrix(); if (choice==1||2)printf("1st Human Won!\n\n"); else printf("1st Computer Won\n\n");}
else {disp_matrix(); if (choice ==1) printf("2nd Human Won!!!!\n\n"); else printf("2nd Computer Won!!!!\n\n");}
// /* show final positions */
return 0;
}
/* Initialize the matrix. */
void init_matrix(void)
{
int i, j;
for(i=0; i<3; i++)
for(j=0; j<3; j++) matrix[i][j] = ' ';
}
/* Get a player's move. */
void get_player_move(int choice)
{
int x, y;
int i,j;
//printf("Enter X,Y coordinates for your move: \n");
if ( choice == 1 || choice == 2 ){
x=scan();
y=scan();
}//get X for human
else
{
for(i=0; i<3; i++){
for(j=0; j<3; j++)
if(matrix[i][j]==' ') break;
if(matrix[i][j]==' ') break;
}//for
}//else
x--; y--;
if(matrix[x][y]!= ' '){
printf("Invalid move, try again.\n");
get_player_move(choice);
}
else matrix[x][y] = 'X';
}
/* Get a move from the computer. */
void get_computer_move(int choice)
{
int i, j ,x, y;
if ( choice == 1 ){
x=scan();
y=scan();
}//get 0 for human
else {
for(i=0; i<3; i++){
for(j=0; j<3; j++)
if(matrix[i][j]==' ') break;
if(matrix[i][j]==' ') break;
}//for
}//else
if(i*j==9) {
printf("draw\n");
exit(0);
}
else
matrix[i][j] = 'O';
}
/* Display the matrix on the screen. */
void disp_matrix(void)
{
int t;
printf("\n");
for(t=0; t<3; t++) {
printf(" %c | %c | %c ",matrix[t][0],
matrix[t][1], matrix [t][2]);
if(t!=2) printf("\n---|---|---\n");
}
printf("\n");
}
/* See if there is a winner. */
char check(void)
{
int i;
for(i=0; i<3; i++) /* check rows */
if(matrix[i][0]==matrix[i][1] &&
matrix[i][0]==matrix[i][2]) return matrix[i][0];
for(i=0; i<3; i++) /* check columns */
if(matrix[0][i]==matrix[1][i] &&
matrix[0][i]==matrix[2][i]) return matrix[0][i];
/* test diagonals */
if(matrix[0][0]==matrix[1][1] &&
matrix[1][1]==matrix[2][2])
return matrix[0][0];
if(matrix[0][2]==matrix[1][1] &&
matrix[1][1]==matrix[2][0])
return matrix[0][2];
return ' ';
}
//STD INPUT
// Choice 1 ) 1 1 1 2 1 3 1 2 2 3 3 3 1 2 1 3 2 2 3
// Choice 2 ) 2 1 1 2 1 3 1 2 2 3 3 3 1 2 1 3 2 2 3
// Choice 3 ) 3
Works well with http://www.compileonline.com/compile_c_online.php
