stringTo delete all a specific character from it in C++ , you can use the following code
str.erase(std::remove(str.begin(), str.end(), 'a'), str.end());
where, removefrom <algorithm>, its signature is
template <class ForwardIterator, class T>
ForwardIterator remove (ForwardIterator first, ForwardIterator last, const T& val);
Function: In the container, delete [first, last)all values between which are equal to valthe value.
Delete method: Overwrite a valvalue that is equal to the next valvalue that is not equal to.
Return value: an iterator (denoted as newEnd), which points to the element next to the last undeleted element, which is equivalent to the container new end.
Therefore, removeafter , [first, newEnd)the elements in the container are all the elements that have not been deleted, and [newEnd, end)the elements in between are useless.
In this way, the elements in between str.erase(newEnd, str.end())can be cleared by running again.[newEnd, end)