Namespaces
Variants
Views
Actions

std::fill

From cppreference.com
< cpp‎ | algorithm
Revision as of 05:06, 16 June 2013 by SuperBoi45 (Talk | contribs)

 
 
 
Defined in header <algorithm>
template< class ForwardIt, class T >
void fill( ForwardIt first, ForwardIt last, const T& value );

Assigns the given value to the elements in the range [first, last).

Contents

Parameters

first, last - the range of elements to modify
value - the value to be assigned
Type requirements
-
ForwardIt must meet the requirements of ForwardIterator.

Return value

(none)

Complexity

Exactly last - first assignments.

Possible implementation

template< class ForwardIt, class T >
void fill(ForwardIt first, ForwardIt last, const T& value)
{
    for (; first != last; ++first) {
        *first = value;
    }
}

Example

The following code uses fill() to set all of the elements of a vector of integers to -1:

#include <algorithm>
#include <vector>
#include <iostream>
 
int main()
{
    int data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    std::vector<int> v1(data, data+10);
 
    std::fill(v1.begin(), v1.end(), -1);
 
    for (std::vector<int>::iterator it = v1.begin(); it != v1.end(); ++it) {
        std::cout << *it << " ";
    }
    std::cout << "\n";
}

Output:

-1 -1 -1 -1 -1 -1 -1 -1 -1 -1

See also

assigns a value to a number of elements
(function template) [edit]
saves the result of a function in a range
(function template) [edit]
applies a function to a range of elements
(function template) [edit]