int main()
{
// Discretization specification.
// First-order forward and backward discretization operators (primatives) for the X-axis
D_plus dpx(0);
D_minus dmx(0);
// Build a second order operator (X-axis)
Operator DPDMx = dpx(dmx);
// First-order forward and backward discretization operators (primatives) for the Y-axis
D_plus dpy(1);
D_minus dmy(1);
// Build a second order operator (Y-axis)
Operator DPDMy = dpy(dmy);
// Build the multidimensional (2D) second order operator (X-axis and Y-axis)
Operator Laplace2D = DPDMx + DPDMy;
// Build data on which to apply operator.
GridFunction u,v;
// Initialize the data
u = 0.0;
// Application of stencil on u saved in v.
v = Laplace2D(u);
// Output data in v.
v.print();
}
ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) {
ListNode dmy(0), *cur = &dmy;
int carry = 0;
while (carry || l1 || l2) {
int sum = carry + (l1 ? l1->val : 0) + (l2 ? l2->val : 0);
carry = sum/10;
cur->next = new ListNode(sum%10);
cur = cur->next;
l1 = (l1 ? l1->next : l1); // one line if
l2 = (l2 ? l2->next : l2);
}
return dmy.next; // return head address
}
