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std::{{{1}}}::resize

من cppreference.com
void resize( size_type count, T value = T() );
(until C++11)
void resize( size_type count );
(1) (since C++11)
void resize( size_type count, const value_type& value );
(2) (since C++11)

Resizes the container to contain ‎count‎ elements.

If the current size is greater than ‎count‎, the container is reduced to its first ‎count‎ elements as if by repeatedly calling ‎pop_back()‎.

If the current size is less than ‎count‎, additional elements are appended and initialized with copies of ‎value‎.

(until C++11)

If the current size is less than ‎count‎,

1) additional default-inserted elements are appended
2) additional copies of ‎value‎ are appended
(since C++11)

محتويات

[تعديل] Parameters

count - new size of the container
value - the value to initialize the new elements with

قالب:par hreq قالب:par req concept قالب:par req concept

[تعديل] Return value

(none)

[تعديل] Complexity

Linear in the size of the container

[تعديل] Example

#include <iostream>
#include <{{{1}}}>
int main()
{
    std::{{{1}}}<int> c = {1, 2, 3};
    std::cout << "The {{{1}}} holds: ";
    for(auto& el: c) std::cout << el << ' ';
    std::cout << '\n';
    c.resize(5);
    std::cout << "After resize up 5: ";
    for(auto& el: c) std::cout << el << ' ';
    std::cout << '\n';
    c.resize(2);
    std::cout << "After resize down to 2: ";
    for(auto& el: c) std::cout << el << ' ';
    std::cout << '\n';
}

الخرج:

The {{{1}}} holds: 1 2 3
After resize up 5: 1 2 3 0 0
After resize down to 2: 1 2

[تعديل] See also

قالب:dsc mem funقالب:dsc mem funقالب:dsc mem fun