Problem with printing board?

[jgg2002]

I've created a tic-tac-toe game than can be played against the computer, the board seems to change correctly, but there seems to be an error in printing the board? Could you please give a look to my code and say? (also there's a problem with altering its elements)

 #include<iostream>
#include<random>
#include<time.h>

using namespace std;

char board[9];

void ini_board(){
for (int i=0; i<9; i++){
    board[i] = 'E';
}
}

void print_board(){
for (int i=0; i<9; i++){
    if ((i+1)%3==0){
        cout<<board[i]<<" ";
        cout<<"\n";
        cout<<string(5, '-');
        cout<<"\n";
    }
    else{
        cout<<board[i]<<":";
    }
}
}

void give_victory(bool &x, bool &y){
char winner;
if (board[0]==board[1]==board[2] && board[0]!='E'){
    winner = board[0];
}
else if(board[3]==board[4]==board[5] && board[3]!='E'){
    winner = board[3];
}
else if(board[6]==board[7]==board[8] && board[6]!='E'){
    winner = board[6];
}
else if(board[0]==board[4]==board[8] && board[0]!='E'){
    winner = board[0];
}
else if(board[2]==board[4]==board[6] && board[2]!='E'){
    winner = board[2];
}
if (winner=='X'){
    x = true;
}
else if(winner=='Y'){
    y = true;
}
}

void play(int &place, bool &x, bool &y){
for (int i=0; i<9; i++){
    if (board[i]!='E'){
        board[i] = 'X';
    }
    give_victory(x, y);
    if (x==true){
        place = i;
    }
    else if (x==false){
        board[i] = 'E';
    }
}
for (int i=0; i<9; i++){
    if (board[i]!='E'){
        board[i] = 'Y';
    }
    give_victory(x, y);
    if (y==true){
        place = i;
    }
    else if(y==false){
        board[i] = 'E';
    }
}
if (x==false && y==false){
    unsigned int de = rand() + 8;
    while(board[de]=='E'){
        de = rand() + 8;
    }
    place = de;
}

}
void cl_sc(){
cout<<string(1000, '\n');
}
int main(){
ini_board();
print_board();
bool x, y;
x = false;
y = false;
int plays = 0;
int cord;
int comp;
while (x==false && y==false && plays<10){
cout<<"Enter place: (1,2,3,4,5,6,7,8,9)\n";
cin>>cord;
while (board[cord]!='E' ||  cord>9){
    cl_sc();
    print_board();
    cout<<"Invalid! Enter again!\n";

}
board[cord] = 'Y';
give_victory(x, y);
plays++;
if (y==true){
    break;
}
play (comp, x, y);
board[comp] = 'X';
plays++;
cl_sc();
print_board();
}
return 0;
}

[AbstractionAnon]

Line 2: Not sure what compiler you're using, but <random> is not a standard header. rand() is in the <cstdlib> header.

You don't call srand() anywhere to initialize the random number generator. You're going to get the same series of pseudo-random numbers every time you run your program.

Line 3: <time.h> is a C header. The correct C++ header is <ctime>.

Line 20: You use std::string, but you haven't included the <string> header.

Line 46: winner is being used without having been initialized.

[jgg2002]

Done, I included string, cstdlib, I used srand(time(NULL)) in the start of main, and initialized winner to a space. By the way, I'm using Code::Blocks with g++ following C++0x ISO standard. Here's the updated code, but the problem still persists.

#include<iostream>
#include<cstdlib>
#include<ctime>
#include<string>

using namespace std;

char board[9];

void ini_board(){
for (int i=0; i<9; i++){
    board[i] = 'E';
}
}

void print_board(){
for (int i=0; i<9; i++){
    if ((i+1)%3==0){
        cout<<board[i]<<" ";
        cout<<"\n";
        cout<<string(5, '-');
        cout<<"\n";
    }
    else{
        cout<<board[i]<<":";
    }
}
}

void give_victory(bool &x, bool &y){
char winner=' ';
if (board[0]==board[1] && board[0]==board[2] && board[0]!='E'){
    winner = board[0];
}
else if(board[3]==board[4] && board[3]==board[5] && board[3]!='E'){
    winner = board[3];
}
else if(board[6]==board[7] && board[6]==board[8] && board[6]!='E'){
    winner = board[6];
}
else if(board[0]==board[4] && board[0]==board[8] && board[0]!='E'){
    winner = board[0];
}
else if(board[2]==board[4] && board[2]==board[6] && board[2]!='E'){
    winner = board[2];
}
if (winner=='X'){
    x = true;
}
else if(winner=='Y'){
    y = true;
}
}

void play(int &place, bool &x, bool &y){
for (int i=0; i<9; i++){
    if (board[i]!='E'){
        board[i] = 'X';
    }
    give_victory(x, y);
    if (x==true){
        place = i;
        return;
    }
    else if (x==false){
        board[i] = 'E';
    }
}
for (int i=0; i<9; i++){
    if (board[i]!='E'){
        board[i] = 'Y';
    }
    give_victory(x, y);
    if (y==true){
        place = i;
        return;
    }
    else if(y==false){
        board[i] = 'E';
    }
}
if (x==false && y==false){
    unsigned int de = rand() + 8;
    while(board[de]=='E'){
        de = rand() + 8;
    }
    place = de;
}

}
void cl_sc(){
cout<<string(1000, '\n');
}
int main(){
srand(time(NULL));
ini_board();
print_board();
bool x, y;
x = false;
y = false;
int plays = 0;
int cord;
int comp;
while (x==false && y==false && plays<10){
cout<<"Enter place: (1,2,3,4,5,6,7,8,9)\n";
cin>>cord;
while (board[cord]!='E' ||  cord>9){
    cl_sc();
    print_board();
    cout<<"Invalid! Enter again!\n";
    cin>>cord;
}
board[cord] = 'Y';
give_victory(x, y);
plays++;
if (y==true){
    break;
}
play (comp, x, y);
plays++;
cl_sc();
print_board();
}
if (x==true){
    cout<<"Player wins!";
}
else{
    cout<<"Computer wins!";
}
return 0;
}