108 lines
2.5 KiB
C++
108 lines
2.5 KiB
C++
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#include <iostream>
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using namespace std;
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//class template
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template <typename T>
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class List{
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private:
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T* list; // Dynamic array to store the list elements
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int capacity; // Maximum capacity of the list
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int length; // Current number of elements in the list
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void resize(){
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// Resize the array to double its current size
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T* newList = new T[capacity * 2];
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for(int i=0;i<length;i++){
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newList[i] = list[i];
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}
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delete[] list;
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list = newList;
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capacity *= 2;
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}
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public:
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// Constructor to initialize the list with a fixed capacity
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List(int initialSize = 100){
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capacity = initialSize;
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list = new T[capacity];
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length = 0;
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}
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// Destructor to free the dynamically allocated memory
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~List(){
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delete[] list;
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}
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// Insert an element at a specific position (0-based index)
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void insert(int position, T value){
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if(position > length) return;
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if(length >= capacity) resize();
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for(int i=length;i>=position;i--){
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list[i+1] = list[i];
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}
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list[position] = value;
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length++;
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}
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// Delete an element by its value (first occurrence)
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bool deleteByValue(T value){
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int index = search(value);
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return deleteByPosition(index);
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}
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// Delete an element by its position (0-based index)
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bool deleteByPosition(int position){
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if(position > length) return false;
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else{
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for(int i=position;i<length;i++){
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list[i] = list[i+1];
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}
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length--;
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}
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return true;
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}
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// Search for an element by its value, return the position if found, otherwise -1
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int search(T value){
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for(int i=0;i<length;i++){
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if(list[i] == value) return i;
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}
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return -1;
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}
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// Access an element by its position (0-based index)
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T access(int position){
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return list[position];
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}
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// Return the current number of elements in the list
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int size(){
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return length;
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}
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// Check if the list is empty
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bool isEmpty(){
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return length == 0;
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}
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// Display the elements of the list
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void display(){
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for(int i=0;i<length;i++){
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cout<<list[i]<<" ";
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}
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}
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};
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int main(){
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List<int> list;
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list.insert(0, 10);
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list.display();
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return 0;
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}
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