std::vector::assign

 

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std::vector

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::vector

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vector::assign

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元素的访问 Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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迭代器 Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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void assign( size_type count, const T& value );	(1)
template< class InputIt > void assign( InputIt first, InputIt last );	(2)

替换该容器的内容.

Original:

Replaces the contents of the container.

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1)

count价值value副本的内容替换

Original:

replaces the contents with count copies of value value

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2)

的内容替换的范围内[first, last)的副本

Original:

replaces the contents with copies of those in the range [first, last)

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参数

count	-	容器的新的大小 Original: the new size of the container The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
value	-	的值初始化容器的元素 Original: the value to initialize elements of the container with The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
first, last	-	取值范围为从复制元素 Original: the range to copy the elements from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Type requirements
- InputIt must meet the requirements of InputIterator.

复杂性

1)

线性count

Original:

linear in count

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2)

first和last之间的距离呈线性关系

Original:

linear in distance between first and last

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为例

下面的代码使用assign添加一个std::vector<char>几个字符

Original:

The following code uses assign to add several characters to a std::vector<char>:

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#include <vector>
#include <iostream>
 
int main()
{
    std::vector<char> characters;
 
    characters.assign(5, 'a');
 
    for (char c : characters) {
        std::cout << c << '\n';
    }
 
    return 0;
}

Output:

a
a
a
a
a

另请参阅

(constructor)	构建vector Original: constructs the vector The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）