std::array<T,N>:: fill
From cppreference.net
C++
Containers library
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(C++17)
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(C++11)
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(C++26)
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(C++26)
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(C++11)
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(C++11)
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(C++11)
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(C++11)
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(C++11)
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(C++23)
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(C++23)
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(C++23)
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(C++23)
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(C++20)
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(C++23)
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void
fill
(
const
T
&
value
)
;
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(自 C++11 起)
(自 C++20 起为 constexpr) |
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将 value 赋值给容器中的所有元素。
目录 |
参数
| value | - | 要分配给元素的值 |
返回值
(无)
复杂度
与容器大小呈线性关系。
示例
运行此代码
#include <array> #include <cstddef> #include <iostream> int main() { constexpr std::size_t xy = 4; using Cell = std::array<unsigned char, 8>; std::array<Cell, xy * xy> board; board.fill({0xE2, 0x96, 0x84, 0xE2, 0x96, 0x80, 0, 0}); // "▄▀"; for (std::size_t count{}; Cell c : board) std::cout << c.data() << ((++ count % xy) ? "" : "\n"); }
可能的输出：
▄▀▄▀▄▀▄▀ ▄▀▄▀▄▀▄▀ ▄▀▄▀▄▀▄▀ ▄▀▄▀▄▀▄▀
参见
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将给定值复制赋值给范围内的每个元素
(函数模板) |
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将给定值复制赋值给范围内的 N 个元素
(函数模板) |
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(C++20)
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为范围内的元素赋予特定值
(算法函数对象) |