Bug in addAt

Bug_LinkedList.cpp

void addAt(int index,int val){
		temp = new node;
		temp->data = val;
		int y = temp->data;
		temp->next = NULL;
        y = temp->data;
        if(head==NULL){
            cout<<"The list is empty"<<endl;
            y=temp->data;
        }else if(index==0){
            temp->next=head->next;
            head = temp;
            y=temp->data;
        }else if(sizeOflist()<index){
            addLast(val);
            y=temp->data;
        }else{
            y=temp->data;
            curr = head;
            y=temp->data;
            int x;
            for(int i=0;i<index-1;i++){
                x = curr->data;
                curr=curr->next;
                x = curr->data;
            }
            int i=curr->next->data;
            y=temp->data;
            temp->next = curr->next;   //exp

            int k = temp->next->data;

            curr->next = temp;        //exp

            y = temp->data;
            int j= curr->next->data;
            cout<<"";
        }
	}