Chasing alorithm

#include <iostream>
#include <ctime>

void wait(int sec)
{
     clock_t endwait;

     endwait = clock() + sec * CLOCKS_PER_SEC;
     while (clock() < endwait) {}
}

int main()
{

    int grid[10][10] =
    {
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0},
        { 0, 0, 0, 0, 0, 0, 0, 0, 0}
    };

    int currentX = 0;
    int currentY = 0;

    int goalX = 5;
    int goalY = 5;

    int deltaX = goalX - currentX;
    int deltaY = goalY - currentY;

    grid[goalX][goalY] = 2;
    grid[currentX][currentY] = 1;

    while(true)
    {
               int directionX;
               int directionY;

               if(deltaX != 0)
               {
                         directionX = deltaX / abs(deltaX);
               }

               if (deltaY != 0)
               {
                     directionY = deltaY / abs(deltaY);
               }

               grid[currentX][currentY] = 0;

               currentX += directionX;
               currentY += directionY;

               grid[currentX][currentY] = 1;


               wait(1);
               system("clear");

               for (int i = 0; i < 9; i++)
               {
                   for(int h = 0; h < 9; h++)
                   {
                           std::cout << grid[i][h];
                   }

                   std::cout << std::endl;

               }

               if((goalX == currentX + 1 || goalX == currentX - 1 && goalY == currentY + 1 || goalY == currentY - 1)) break;
    }

    system("pause");
    return 0;
}