std::deque::resize
STD：：DEQUE：：调整大小
| 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) |
调整容器的大小以包含count元素。
如果当前大小大于count，容器被简化为第一个容器。count元素。
| 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) |
参数
| count | - | new size of the container |
|---|---|---|
| value | - | the value to initialize the new elements with |
类型要求
-T必须满足MoveInsertable和DefaultInsertable的要求，才能使用过载%281%29。
T必须满足CopyInsertable的要求才能使用过载%282%29。
返回值
%280%29
复杂性
当前大小与count...
例
二次
#include <iostream>
#include <deque>
int main()
{
std::deque<int> c = {1, 2, 3};
std::cout << "The deque 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';
}
二次
产出：
二次
The deque holds: 1 2 3
After resize up 5: 1 2 3 0 0
After resize down to 2: 1 2
二次
另见
| size | returns the number of elements (public member function) |
|---|---|
| insert | inserts elements (public member function) |
| erase | erases elements (public member function) |
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