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Home » C++ STL

array::fill() in C++ Standard Template Library (STL)



C++ STL array::fill() function with Example: Here, we are going to learn about the fill() function of array container in C++ Standard Template Library (STL).
Submitted by IncludeHelp, on September 05, 2018

fill() is a member function of "array container", which sets a given value to all array elements. It can also be used to set the value to other of containers also. Value type should be same as container type.

For example – if an array is an integer type then provided value should be an integer type. If we provide other type of fill value, implicit cast type will be applied.

Syntax:

    arr_name.fill(value);

Program:

#include <iostream>
#include <array>

using namespace std;

int main() 
{
	//declaring array with dynamic size
	array<int,5> arr;

	//print array elements with default values
	cout<<"Array elements with default values:\n";
	for (auto loop = arr.begin() ; loop != arr.end() ; ++loop)
		cout<<*loop<<" ";
	cout<<"\n";

	//fill array element with 0
	arr.fill (0);

	//AGAIN...
	//print array element with default values
	cout<<"Array elements after filling with 0:\n";
	for (auto loop = arr.begin() ; loop != arr.end() ; ++loop)
		cout<<*loop<<" ";
	cout<<"\n";

	//fill array element with 0 
	arr.fill (36);

	//AGAIN...
	//print array element with default values
	cout<<"Array elements after filling with 36:\n";
	for (auto loop = arr.begin() ; loop != arr.end() ; ++loop)
		cout<<*loop<<" ";
	cout<<"\n";

	return 0;
}

Output

Array elements with default values:
142 0 0 0 994036560 
Array elements after filling with 0:
0 0 0 0 0 
Array elements after filling with 36:
36 36 36 36 36 

Reference: C++ std::array::fill()






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