Erase method in string

1.

Put the starting position in the middle

Or starting position and number

#include<iostream>
#include<string>
using namespace std;

int main(){
    string str = "hello c++! +++";
    //  From the position pos=10 Start deleting at , Until the end 
    //  namely ： " +++"
    str.erase(10);
    cout << '-' << str << '-' << endl;
    //  From the position pos=6 Start at , Delete 4 Characters 
    //  namely : "c++!"
    str.erase(6, 4);
    cout << '-' << str << '-' << endl;
    return 0;
}

2.

iterator [ ）

#include<iostream>
#include<string>
using namespace std;

int main(){
    string str = "hello c++! +++";
    //  Delete "+++" One space before 
    str.erase(str.begin()+10);
    cout << '-' << str << '-' << endl;
    //  Delete "+++"
    str.erase(str.begin() + 10, str.end());
    cout << '-' << str << '-' << endl;
    return 0;
}

3. Single character of iterator position

iterator erase(const_iterator position)

Delete a single character at the iterator position , And back to Next element The iterator

4.pop_back(): Delete the last element

5. Often with find Functions together

string longer("That's a funny hat.");
//size_type loc1 = longer.find("hat"); //  There is 
size_type loc1 = longer.find("hello"); // non-existent 
if (loc1 == string::npos)
    cout<< "not found" <<endl;