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Array class in C++
Array class in C++ are efficient enough and also it knows its own size.
Functions used to perform operations on array are
- size() = To return the size of array i.e. returns the no of elements of the array.
- max_size() = To return maximum number of elements of the array.
- get(), at(), operator[] = To get access of the array elements.
- front() = To return front element of the array.
- back() = To return last element of the array.
- empty() = Returns true if array size is true otherwise false.
- fill() = To fill the entire array with a particular value.
- swap() = To swap the elements of one array to another.
Here is an example to implements all the operations as mentioned above −
Example Code
#include<iostream>
#include<array>
using namespace std;
int main() {
array<int,4>a = {10, 20, 30, 40};
array<int,4>a1 = {50, 60, 70, 90};
cout << "The size of array is : ";
//size of the array using size()
cout << a.size() << endl;
//maximum no of elements of the array
cout << "Maximum elements array can hold is : ";
cout << a.max_size() << endl;
// Printing array elements using at()
cout << "The array elements are (using at()) : ";
for ( int i=0; i<4; i++)
cout << a.at(i) << " ";
cout << endl;
// Printing array elements using get()
cout << "The array elements are (using get()) : ";
cout << get<0>(a) << " " << get<1>(a) << " "<<endl;
cout << "The array elements are (using operator[]) : ";
for ( int i=0; i<4; i++)
cout << a[i] << " ";
cout << endl;
// Printing first element of array
cout << "First element of array is : ";
cout << a.front() << endl;
// Printing last element of array
cout << "Last element of array is : ";
cout << a.back() << endl;
cout << "The second array elements before swapping are : ";
for (int i=0; i<4; i++)
cout << a1[i] << " ";
cout << endl;
// Swapping a1 values with a
a.swap(a1);
// Printing 1st and 2nd array after swapping
cout << "The first array elements after swapping are : ";
for (int i=0; i<4; i++)
cout << a[i] << " ";
cout << endl;
cout << "The second array elements after swapping are : ";
for (int i = 0; i<4; i++)
cout << a1[i] << " ";
cout << endl;
// Checking if it is empty
a1.empty()? cout << "Array is empty":
cout << "Array is not empty";
cout << endl;
// Filling array with 1
a.fill(1);
// Displaying array after filling
cout << "Array content after filling operation is : ";
for ( int i = 0; i<4; i++)
cout << a[i] << " ";
return 0;
}Output
The size of array is : 4 Maximum elements array can hold is : 4 The array elements are (using at()) : 10 20 30 40 The array elements are (using get()) : 10 20 The array elements are (using operator[]) : 10 20 30 40 First element of array is : 10 Last element of array is : 40 The second array elements before swapping are : 50 60 70 90 The first array elements after swapping are : 50 60 70 90 The second array elements after swapping are : 10 20 30 40 Array is not empty Array content after filling operation is : 1 1 1 1
Updated on: 30-Jul-2019
3K+ Views
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