I need your help to C++ TicTacToe 5x5 game code . I didn't find problem . I hope u all help me..

[William2404]

#include<iostream>
#include<cstdlib>

using namespace std;

char square[27]={'0','1','2','3','4','5','6','7','8','9','10','11','12','13','14','15','16','17','18','19','20','21','22','23','24','25','\0'};
void board();
int win();

int main(){

char playagain='y';
while(playagain=='y'){
cout<<" Welcome in my Tic Tac Toe game !!!\n\n "<<endl;
int player=1;
int i,choice;
char mark;

do{
board();
player=(player%2)?1:2;
cout<<"Player "<<player<<" enter a number: ";
cin>>choice;
mark=(player==1)?'X':'O';

if(choice==1 && square[1]=='1')

square[1]=mark;
else if (choice == 2 && square[2] == '2')

square[2] = mark;
else if (choice == 3 && square[3] == '3')

square[3] = mark;
else if (choice == 4 && square[4] == '4')

square[4] = mark;
else if (choice == 5 && square[5] == '5')

square[5] = mark;
else if (choice == 6 && square[6] == '6')

square[6] = mark;
else if (choice == 7 && square[7] == '7')

square[7] = mark;
else if (choice == 8 && square[8] == '8')

square[8] = mark;
else if (choice == 9 && square[9] == '9')

square[9] = mark;
else if (choice == 10 && square[10] == '10')

square[10] = mark;
else if (choice == 11 && square[11] == '11')

square[11] = mark;
else if (choice == 12 && square[12] == '12')

square[12] = mark;
else if (choice == 13 && square[13] == '13')

square[13] = mark;
else if (choice == 14 && square[14] == '14')

square[14] = mark;
else if (choice == 15 && square[15] == '15')

square[15] = mark;
else if (choice == 16 && square[16] == '16')

square[16] = mark;
else if (choice == 17 && square[17] == '17')

square[17] = mark;
else if (choice == 18 && square[18] == '18')

square[18] = mark;
else if (choice == 19 && square[19] == '19')

square[19] = mark;
else if (choice == 20 && square[20] == '20')

square[20] = mark;
else if (choice == 21 && square[21] == '21')

square[21] = mark;
else if (choice == 22 && square[22] == '22')

square[22] = mark;
else if (choice == 23 && square[23] == '23')

square[23] = mark;
else if (choice == 24 && square[24] == '24')

square[24] = mark;
else if (choice == 25 && square[25] == '25')



square[25] = mark;
else
{
cout<<"\nINVALID MOVE \n\n";
player--;
}

i=win();
player++;
}while(i==-1);
board();
if(i==1)
cout<<"Player "<<--player<<" win";
if(i==0)
cout<<"Game draw";
cout<<"\n\nWanna play again(y/n)?:";
cin>>playagain;
cout<<endl;

if(playagain=='y'){
cout<<"You choice to play again\n\n";
}
else if(playagain=='n'){
cout<<"You choice not to play again\n\n";
}
else{
cout<<"You didnt put an valid character , so I will take it like(n),so the program will close.\n\n";
}

for(int c=0;c<120;c++){
cout<<"****";
}
cout<<endl;

square[1] = '1';
square[2] = '2';
square[3] = '3';
square[4] = '4';
square[5] = '5';
square[6] = '6';
square[7] = '7';
square[8] = '8';
square[9] = '9';
square[10] = '10';
square[11] = '11';
square[12] = '12';
square[13] = '13';
square[14] = '14';
square[15] = '15';
square[16] = '16';
square[17] = '17';
square[18] = '18';
square[19] = '19';
square[20] = '20';
square[21] = '21';
square[22] = '22';
square[23] = '23';
square[24] = '24';
square[25] = '25';

}}

int win(){

if(square[1]==square[2]&&square[2]==square[3]&&square[3]==square[4]&&square[4]==square[5])
return 1;

else if(square[6]==square[7]&&square[7]==square[8]&&square[8]==square[9]&&square[9]==square[10])
return 1;

else if(square[11]==square[12]&&square[12]==square[13]&&square[13]==square[14]&&square[14]==square[15])
return 1;

else if(square[16]==square[17]&&square[17]==square[18]&&square[18]==square[19]&&square[19]==square[20])
return 1;

else if(square[21]==square[22]&&square[22]==square[23]&&square[23]==square[24]&&square[24]==square[25])
return 1;

else if(square[1]==square[2]&&square[2]==square[13]&&square[13]==square[19]&&square[19]==square[25])
return 1;

else if(square[5]==square[9]&&square[9]==square[13]&&square[13]==square[17]&&square[17]==square[21])
return 1;

else if(square[1]==square[6]&&square[6]==square[11]&&square[11]==square[16]&&square[16]==square[21])
return 1;

else if(square[2]==square[7]&&square[7]==square[12]&&square[12]==square[17]&&square[17]==square[22])
return 1;

else if(square[3]==square[8]&&square[8]==square[13]&&square[13]==square[18]&&square[18]==square[23])
return 1;

else if(square[4]==square[9]&&square[9]==square[14]&&square[14]==square[19]&&square[19]==square[24])
return 1;

else if(square[5]==square[10]&&square[10]==square[15]&&square[15]==square[20]&&square[20]==square[25])
return 1;

else if (square[1] != '1' && square[2] != '2' && square[3] != '3' && square[4] != '4' &&square[5] != '5' && square[6] != '6' && square[7] != '7' && square[8] != '8' && square[9] != '9' && square[10] != '10' && square[11] != '11' && square[12] != '12' && square[13] != '13' && square[14] != '14' && square[15] != '15' && square[16] != '16' && square[17] != '17' && square[18] != '18' && square[19] != '19' && square[20] != '20' && square[21] != '21' && square[22] != '22' && square[23] != '23' && square[24] != '24' && square[25] != '25')

return 0;

else
return -1;
}

void board(){

cout<<"\tTic Tac Toe\t\t\n\n";
cout<<"PLAYER 1(X) , PLAYER 2(O)\n\n";

cout<<square[1]<<"|"<<square[2]<<"|"<<square[3]<<"|"<<square[4]<<"|"<<square[5]<<endl;
cout<<"-----"<<endl;
cout<<square[6]<<"|"<<square[7]<<"|"<<square[8]<<"|"<<square[9]<<"|"<<square[10]<<endl;
cout<<"-----"<<endl;
cout<<square[11]<<"|"<<square[12]<<"|"<<square[13]<<"|"<<square[14]<<"|"<<square[15]<<endl;
cout<<"-----"<<endl;
cout<<square[16]<<"|"<<square[17]<<"|"<<square[18]<<"|"<<square[19]<<"|"<<square[20]<<endl;
cout<<"-----"<<endl;
cout<<square[21]<<"|"<<square[22]<<"|"<<square[23]<<"|"<<square[24]<<"|"<<square[25]<<endl;

}

[salem c]

1. Please edit your post to use code tags.
http://www.cplusplus.com/articles/jEywvCM9/

2. None of your 'xx' two-character things will ever fit in a char.