Unknown Runtime Error (ncurses)

I am working on a simple TicTacToe project with an ncurses GUI, and I seem to have made an error I don't remember making, a now when I run the program the ncurses window does not come up. I can't figure out what the issue is.



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#include <iostream>
#include <ncurses.h>
#include <stdio.h>
#include <assert.h>

using namespace std;

class TicTacToe
{
public:

	TicTacToe();

	void displayGrid();
	void input();
	void openLine(int y_cor);
	void closedLine(int y_cor);

private:

	int turn;
	static const int ROWS = 5;
	static const int COLS = 6;
	char board[ROWS][COLS];
};


TicTacToe::TicTacToe()
{
	for(int i = 0; i < ROWS; i++)
		for (int j = 0; j < COLS; j++)
			board[i][j] = ' ';

	turn = 1;
}

/*
void TicTacToe::displayGrid()
{
	openLine(10);
	closedLine(11);
	openLine(12);
	closedLine(13);
	openLine(14);
}
*/

void TicTacToe::openLine(int y_cor)
{
	mvprintw(y_cor, 20, " | | ");
}

void TicTacToe::closedLine(int y_cor)
{
	mvprintw(y_cor, 20, "-----");
}

void TicTacToe::input()
{
	int x, y;
	int x_cor = 3, y_cor = 3;

	

	mvprintw(0, 0, "Your turn.\nInput coordinate x:");
	do{ 
	scanf("%d", &x);
	}while(x > 3 || x < 1);

	if (x = 1)
	{
		x_cor = 0;
	}
	else if (x = 2)
	{
		x_cor = 3;
	}
	else if (x = 3)
	{
		x_cor = 5;
	}

	mvprintw(1, 0, "Input coordiante y: ");
	do{
	scanf("%d", &y);
	}while(y > 3 || y < 1);
		
	if (y = 1)
	{
        	y_cor = 0;
	}
        else if (y = 2)
	{
        	y_cor = 3;
	}
        else if (y = 3)
	{
        	y_cor = 5;
	}
	
	mvprintw(1, 18, ":");
	mvprintw(y_cor + 10, x_cor + 20, "X");



}



int main()
{
	TicTacToe game;
	WINDOW * wnd;
	int row, col;
	char yesno;

	wnd = initscr();

	getmaxyx (wnd, col, row);

	//game.displayGrid();	

	start_color();
	init_pair(1, COLOR_RED, COLOR_BLACK);

	attron(COLOR_PAIR(1));


	mvprintw(9, 20, "1 2 3");
	mvprintw(10, 18, "1");
	game.openLine(10);  
        game.closedLine(11);
	mvprintw(12, 18, "2");
        game.openLine(12);
        game.closedLine(13);
	mvprintw(14, 18, "3");
        game.openLine(14);

	game.input();


	attroff(COLOR_PAIR(1));

	do
	{
		mvprintw (17, 17, "End program?");

		scanf("%c", &yesno);

		if (yesno == 'y' || yesno == 'Y')
			endwin();

	}while (yesno != 'y' && yesno != 'Y');



	return 0;

}

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