insertToNthPosition.cpp

void List::insertToNthPosition(int pos,int newData){
    temp = new node;
    temp->data = newData;
    temp->next = NULL;
    if(pos==1){
        head = temp;
    }else{
        curr = head;
        for(int i=0;i<pos-2;i++){
            curr=curr->next;
        }
        temp->next = curr->next;
        curr->next=temp;
    }
}

code is not working

Exception thrown: read access violation.

this->temp was nullptr.