CODE EXAMPLE FOR CPP

how to modify 2d array in function c++

void Insert_into_2D_Array(int** foo, int x_pos, int y_pos, int x_size, int y_size)
{
  int insert_value = 10; 

  if (x_pos < x_size && y_pos < y_size) {
    foo[x_pos][y_pos] = insert_value;    // insert_value lost post func exit?
  }
}

void Init_2D_Array(int** foo, int x_size, int y_size)
{

  foo = new int*[x_size];    // new alloc mem lost post func exit ?
  for (int i=0;i<x_size;i++)
  {
      foo[i] = new int[y_size];     // new alloc mem lost post func exit
  }
}

int main(int agc, char** argv)
{

  int** foo; 
  int x_size=10, y_size=10;   
  Init_2D_Array(foo, x_size, y_size); 
  Insert_into_2D_Array(foo, 3,3, x_size, y_size); 

}