# Why can't I include code ?

• '''
/**

• struct ListNode {
• ``````int val;
``````
• ``````ListNode *next;
``````
• ``````ListNode(int x) : val(x), next(NULL) {}
``````
• };
/
class Solution {
public:
ListNode
int c = 0;
ListNode *t1 = l1,*t2 = l2,*pre;
while(t1 != NULL && t2 != NULL)
{
t1->val += t2->val + c;
if (t1->val >= 10)
{
c = t1->val / 10;
t1->val %= 10;
}
else
c = 0;
pre = t1;
t1 = t1 -> next;
t2 = t2 -> next;
}
while(t1 != NULL)
{
t1->val += c;
if(t1->val >= 10)
{
c = t1->val / 10;
t1->val %= 10;
}
else
c = 0;
pre = t1;
t1 = t1->next;
}
while(t2 != NULL)
{
if(t1 == NULL) t1 = new ListNode(c);
t1->val += t2->val;
if(t1->val >= 10)
{
c = t1->val /10;
t1->val %= 10;
}
else
c = 0;
pre->next = t1;
pre = t1;
t1 = t1 -> next;
t2 = t2 -> next;
}
if(c)
{
t1 = new ListNode(c);
pre->next = t1;
}
return l1;
}
'''

• Note that it is 3 backquotes (just below the ESC in the keyboard), not 3 single quotes ''' (left of the ENTER in the keyboard).

``````/**
* struct ListNode {
*     int val;
*     ListNode *next;
*     ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) {
int c = 0;
ListNode *t1 = l1,*t2 = l2,*pre;
while(t1 != NULL && t2 != NULL)
{
t1->val += t2->val + c;
if (t1->val >= 10)
{
c = t1->val / 10;
t1->val %= 10;
}
else
c = 0;
pre = t1;
t1 = t1 -> next;
t2 = t2 -> next;
}
while(t1 != NULL)
{
t1->val += c;
if(t1->val >= 10)
{
c = t1->val / 10;
t1->val %= 10;
}
else
c = 0;
pre = t1;
t1 = t1->next;
}
while(t2 != NULL)
{
if(t1 == NULL) t1 = new ListNode(c);
t1->val += t2->val;
if(t1->val >= 10)
{
c = t1->val /10;
t1->val %= 10;
}
else
c = 0;
pre->next = t1;
pre = t1;
t1 = t1 -> next;
t2 = t2 -> next;
}
if(c)
{
t1 = new ListNode(c);
pre->next = t1;
}
return l1;
}
``````

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