如何按值從 C 向量中刪除元素？

Removing Vector Elements by Value in C++

In C++, the erase() method of vectors allows us to remove elements by their position. But what if we want to remove an element based on its value rather than its position?

Consider the following vector:

vector<int> myVector = {5, 9, 2, 8, 0, 7};

To erase the element with a value of "8" using the traditional erase() method, we would do:

myVector.erase(myVector.begin() + 4);

However, to remove an element by value, we can use the std::remove() function:

#include <algorithm>
...

myVector.erase(std::remove(myVector.begin(), myVector.end(), 8), myVector.end());

Here's how it works:

• std::remove() takes three arguments: the start and end iterators of the vector and the value to be removed.
• It returns an iterator pointing to the element after the last removed element.
• The erase() method is then used to remove the elements from the iterator returned by std::remove() to the end of the vector.

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