In C++ There is modification to the original assignment - mainly the input/output. Instead of having...

Question

Question

In C++ There is modification to the original assignment - mainly the input/output. Instead of having...

In C++

There is modification to the original assignment - mainly the input/output.

Instead of having the players enter the coordinates , the players will enter a number (1 - 9) instead.

The game board should be displayed as:

1 2 3

4 5 6

7 8 9

If player O enters a 5, the game board will become:

1 2 3

4 O 6

7 8 9

=================================================================================

If a player entered a character other than 1 - 9, the program will indicate the fact and let the same player try again.

If a player entered a position (1 - 9) that is already occupied, the program will indicate the fact and let the same player try again.

As soon as a winner emerges, the program announces the winner and terminate the game.

If all positions are taken and no winner, the program announces the game result as a tie.

*** Note 1: please avoid hard coding, think in the future you might expand the game from 3 x 3 to m x m.

*** Note 2: to convert between int and string:

int i = stoi("8");

string s = to_string(100);

*** Note 3:

0 1 2 -----------j

i----- 0 1 2 3

1 4 5 6

2 7 8 9

here i is index for row, j is index for column

if given value n (1- 9),

i = (n-1) / 3

j = (n-1) % 3

if given i and j,

n = 3 * i + j + 1

engineering Computer-Science

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Answer 1

Answer #1

below steps can be follwoed to complete the problem :

create a function to replace the number in the grid with the current_player marker.
create a function to check if player has any row , column or diagnoal with all markers.
1. if found return true.
2. else false/
create a function to check if the grid id full or not. (it is not full if any cell has vlaues other than "O" or "X").
create a function to print the grid.
in the main fucntion :
1. play the game until either the grid is full or either player wins.
2. display appropriate message.

more info and code :

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code :

#include <iostream>
#include <string>
using namespace std;

const int row = 3;
const int col = 3;
const string player_id[] = {"O" , "X"};

// function to place the player's marker at specified number in the grid.
void modify_grid(string grid[row][col] , int num , int player_index){

int i = (num-1) / row;
int j = (num-1) % col;
if(grid[i][j] == player_id[player_index] && grid[i][j] == player_id[player_index]){
cout<<"This cell is already occupied\n";
}
// cout<<i<<" "<<j;
grid[i][j] = player_id[player_index];
}

// function to print the grid.
void print_grid(string grid[row][col]){
for(int i=0;i<row;i++){
for(int j=0;j<col;j++){
cout<<grid[i][j]<<" ";
}
cout<<endl;
}
}

// function to check if current player has won the game.
bool check_winner(string grid[row][col] , int player_index){
// travers the grid for all rows , all columns , diagonal from top_left to bottom right , diagonal from top right to bottom_left
// and see we have a full set of current player marker, return true if found , else false.

for(int i=0;i<row;i++){
int consecutive_count = 0;
for(int j=0;j<col;j++){
if (grid[i][j] == player_id[player_index]){
consecutive_count += 1;
}
}
if(consecutive_count == col){
return true;
}
}

for(int i=0;i<col;i++){
int consecutive_count = 0;
for(int j=0;j<row;j++){
if (grid[i][j] == player_id[player_index]){
consecutive_count += 1;
}
}
if(consecutive_count == col){
return true;
}
}

int i = 0;
int j = 0;
int consecutive_count_diag_left = 0;
while (i<row && j < col){
if (grid[i][j] == player_id[player_index]){
consecutive_count_diag_left += 1;
}
i += 1;
j += 1;
}
if(consecutive_count_diag_left == row){
return true;
}

i = 0;
j = col-1;
int consecutive_count_diag_right = 0;
while (i<row && j >= 0){
if (grid[i][j] == player_id[player_index]){
consecutive_count_diag_right += 1;
}
i += 1;
j -= 1;
}
if(consecutive_count_diag_right == row){
return true;
}

return false;
}

bool is_full(string grid[row][col]){
for(int i=0;i<row;i++){
for(int j=0;j<col;j++){
if(grid[i][j] != "O" && grid[i][j] != "X"){
return false;
}
}
}
return true;
}

int main(){
string grid[row][col];
for(int i=0;i<row;i++){
for(int j=0;j<col;j++){
int value = (3*i)+j+1;
grid[i][j] = to_string(value);
}
}
print_grid(grid);
cout<<"Player 0 has 'O' marker\n Player 1 has 'X' marker\n";
cout<<"Lets start the game\n";
int current_player = 1;
int num = -1;
while (!is_full(grid) && !check_winner(grid , current_player)){
current_player = 1 - current_player;
cout<<"Player "<<current_player<<" Enter the integer to be replaced: ";
cin>>num;
if(num < 1 && num > (row*col)){
cout<<"Invalid input\n";
continue;
}
modify_grid(grid , num , current_player);
print_grid(grid);
}
if(check_winner(grid , current_player)){
cout<<"Player "<<current_player<<" Won the game!!\n";
}
else{
cout<<"GamE Tied\n";
}
return 0;
}

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