string::erase (2 of 3 overloads)

Erase a character from the string.

iterator
erase(
    const_iterator pos);

Erases the character at pos.

pos >= data() && pos <= data() + size()

Strong guarantee.

All references, pointers, or iterators referring to contained elements are invalidated. Any past-the-end iterators are also invalidated.

An iterator referring to character immediately following the erased character, or end() if one does not exist.

Name	Description
`pos`	An iterator referring to the character to erase.