C++ LList::erase方法代码示例

/*Function for removing the row
	The spreadsheet is iterated till the position where the row is to be removed. remove() is called to
	remove a row at the row value position in user input. If last row is removed, tail pointer is adjusted
	and made to point the row above it. If first row (0th row) is removed, head pointer is adjusted adjusted
	to point next row.
	*/
void removeRow(LList<LList<Cell*>>& rows, int removeRowValue){
	int h = 0; //increments to track the height or row value
	LList<LList<Cell*>>::iterator I = rows.begin();
	for (LList<LList<Cell*>>::iterator I = rows.begin(); I != rows.end(); I++){

		/*Remove a cell on the position if the value of the rows iterated equals to the value of row
		in the user input where the row is to be removed.
		*/
		if (h == removeRowValue){
			I = rows.erase(I, removeRowValue, height);
		}
		h++;
	}

	//decrease the height of the spreadsheet by one if a row is removed
	height -= 1;
}

int main()
{

	LList<int> llist;
	LList<int>::iterator it = llist.begin();
	LList<int>::iterator it2 = llist.end();
	it2 = LList<int>::iterator(it);
#if 1
	it  = llist.insert(it,1);
	it  = llist.insert(it,2);
	it  = llist.insert(it,3);
	it = llist.begin();
	cout<<"--------insert-------------"<<endl;
	for(;it != llist.end();it++)
		cout<<*it<<endl;

	llist.clear();

	llist.push_back(11);
	llist.push_back(12);
	llist.push_back(13);
	llist.erase(llist.begin());
	cout<<"--------push_back-------------"<<endl;
	for(it=llist.begin();it != llist.end();it++)
		cout<<*it<<endl;
	llist.clear();
	cout<<"--------size-------------"<<llist.size()<<endl;
	llist.push_back(14);
	llist.push_back(15);
	llist.push_back(16);
	for(it=llist.begin();it != llist.end();it++)
		cout<<*it<<endl;
	cout<<"--------transfer-------------"<<llist.size()<<endl;
	LList<int>::iterator first= ++llist.begin();
	LList<int>::iterator last= llist.end();
	llist.transfer(++llist.begin(),++first,last);
	for(it=llist.begin();it != llist.end();it++)
		cout<<*it<<endl;
	cout<<"--------reverse-------------"<<llist.size()<<endl;
	llist.reverse();
	for(it=llist.begin();it != llist.end();it++)
		cout<<*it<<endl;
#endif		
	return 0;
}

int main() {
    LList L;

    srand(77);
    unsigned int r, e, pos;

    r = rand() % 12;
    cout << "Inserting " << r << " elements to the list...." << endl;
    for (int i=0; i<r; i++) {
        e = rand()%100;
        cout << "Inserting " << e << " at position 0" << endl;
        L.insert(e,0);
    }
    cout << "Contents of the list: " << L << endl << endl;

    r = rand() % r;
    cout << "Now erasing elements from random positions ...." << endl;
    for (int i=0; i<r; i++) {
        pos = rand()% L.getSize();
        cout << "Erasing from position " << pos << endl;
        L.erase(pos);
        cout << "Contents of the list: " << L << endl;
    }

    cout << endl;


    /***** Uncomment after you have implemented the push function *

    e = rand()%100;
    cout << "Now lets push a " << e <<" into the list..." << endl;
    cout << "The list is " << L.push(e) << " long " << endl;
    cout << "And contains: " << L << endl << endl;

    ************************************************************/


    /***** Uncomment after you have implemented the shift function *

    cout << "I have removed the element from the front of the list: " 
         << L.shift() << endl;
    cout << "List now contains: " << L << endl << endl;

    ************************************************************/



    /***** Uncomment after you have implemented the pop function *

    cout << "Removing element from the front of the list using pop() " << endl; 
    cout << "The element is: " << L.pop() << endl;
    cout << "List now contains: " << L << endl << endl;

    // Error del profe! No descomente
    // pos = rand() % L.getSize();
    // cout << "Removing element from pos " <<  pos 
    //     << " of the list using pop(" << pos << ")" << endl; 
    // cout << "The element is: " << L.pop(pos) << endl;
    // cout << "List now contains: " << L << endl << endl;

    ************************************************************/


    /***** Uncomment after you have implemented the splice function *
    
    r = rand() % (L.getSize()/2);
    r = 9;
    pos = rand() % (L.getSize()/2);
    cout << "Using the splice function to remove " << r 
         << " elements starting at position " << pos << endl; 
    cout << "The removed elements are: " << L.splice(pos, r) << endl;
    cout << "After splice, the List:" << L << endl << endl;

    ************************************************************/

    /***** Uncomment after you have implemented the join function

    cout << "The following is a string of all elements, using join:" << endl;
    cout << L.join("-") << endl << endl;
    
    ************************************************************/

    


    cout << endl;


    
    
}