7.10: tic tac toe (sort of) write a program that will allow two users to play tic-tac-toe. the program should ask for moves alternately from player x and player o. the program displays the game positions as follows: 123 456 789 the players enter their moves by entering the position number (a single digit, 1-9) they wish to mark. after each move, the program re-displays the changed board. a sample board configuration is as follows: xxo 456 o89 sample run #1: ./etest interactive session 1 2 3 4 5 6 7 8 9 enter move: 1 x 2 3 4 5 6 7 8 9 enter move: 2 x o 3 4 5 6 7 8 9 enter move: 3 x o x 4 5 6 7 8 9 enter move: 4 x o x o 5 6 7 8 9 enter move: 5 x o x o x 6 7 8 9 enter move: 6 x o x o x o 7 8 9 enter move: 7 x o x o x o x 8 9 enter move: 8 x o x o x o x o 9 enter move: 9 x o x o x o x o x game over!

C++ code below which follows the instructions of the questions. Follow the question as you move along with the code for better understanding

Explanation:

#include <iostream>

using namespace std;

// void showPos(int arr1[],int arr2[],int arr3[]);

void showPos(char arr1[],char arr2[],char arr3[]){

int i;

for(i=0;i<3;i++){

if(arr1[i]=='u'){

cout<<i+1<<" ";

}else

{

cout<<arr1[i]<<" ";

}

}

cout<<"\n";

for(i=0;i<3;i++){

if(arr2[i]=='u'){

cout<<i+4<<" ";

}else

{

cout<<arr2[i]<<" ";

}

}

cout<<"\n";

for(i=0;i<3;i++){

if(arr3[i]=='u'){

cout<<i+7<<" ";

}else

{

cout<<arr3[i]<<" ";

}

}

cout<<"\n";

}

int checkWin(char arr1[],char arr2[],char arr3[],char key,int ind){

if(ind==1){

if((arr1[0]==key && arr1[1]==key && arr1[2]==key)|| (arr1[0]==key && arr2[0]==key && arr3[0]==key)|| (arr1[0]==key && arr2[1]==key && arr3[2]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

}

else return 0;

}else if(ind==2){

if((arr1[0]==key && arr1[1]==key && arr1[2]==key)|| (arr1[1]==key && arr2[1]==key && arr3[1]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}else if(ind ==3){

if((arr1[0]==key && arr1[1]==key && arr1[2]==key)|| (arr1[2]==key && arr2[1]==key && arr3[0]==key)|| (arr1[2]==key && arr2[2]==key && arr3[2]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}else if(ind ==4){

if((arr1[0]==key && arr2[0]==key && arr3[0]==key)|| (arr2[0]==key && arr2[1]==key && arr2[2]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}else if(ind ==5){

if((arr2[0]==key && arr2[1]==key && arr2[2]==key)|| (arr1[1]==key && arr2[1]==key && arr3[1]==key)|| (arr1[0]==key && arr2[1]==key && arr3[2]==key)|| (arr1[2]==key && arr2[1]==key && arr3[0]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}

else if(ind ==6){

if((arr1[2]==key && arr2[2]==key && arr3[2]==key)|| (arr2[0]==key && arr2[1]==key && arr2[2]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}else if(ind ==7){

if((arr1[0]==key && arr2[0]==key && arr3[0]==key)|| (arr3[0]==key && arr3[1]==key && arr3[2]==key) || (arr1[2]==key && arr2[1]==key && arr3[0]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}

else if(ind ==8){

if((arr3[0]==key && arr3[1]==key && arr3[2]==key)|| (arr1[1]==key && arr2[1]==key && arr3[1]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}

else if(ind ==9){

if((arr3[0]==key && arr3[1]==key && arr3[2]==key)|| (arr1[2]==key && arr2[2]==key && arr3[2]==key)|| (arr1[0]==key && arr2[1]==key && arr3[2]==key)){

cout<<"Player "<<key<<"is Winner"<<endl;

return 1;

} else return 0;

}

else{

cout<<"No Winner for preset move..."<<endl;

return 0;

}

}

int main()

{

char arr1[3]={'u','u','u'};

char arr2[3]={'u','u','u'};

char arr3[3]={'u','u','u'};

cout<<"Initial Game positions.."<<endl;

cout<<"Players are X and 0"<<endl;

showPos(arr1,arr2,arr3);

while(1){

int xc,oc,xind,oind;

cout<<"Player X choice please select cell:"<<endl;

cin>>xc;

xind = xc-1;

if(xc>=1 && xc<=3){

arr1[xind] = 'X';

}

if(xc>=4 && xc<=6){

arr1[xind] = 'X';

}

if(xc>=7 && xc<=9){

arr1[xind] = 'X';

}

showPos(arr1,arr2,arr3);

int check = checkWin(arr1,arr2,arr3,'X',xc);

if(check==1){

break;

}

cout<<"Player O choice please select cell:"<<endl;

cin>>xc;

oind = xc-1;

if(xc>=1 && xc<=3){

arr1[oind] = 'O';

}

if(xc>=4 && xc<=6){

arr1[oind] = 'O';

}

if(xc>=7 && xc<=9){

arr1[oind] = 'O';

}

showPos(arr1,arr2,arr3);

int checks = checkWin(arr1,arr2,arr3,'O',xc);

if(checks==1){

break;

}

}

return 0;

}

answer:

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