erasing a character from a string in c 2b 2b

1str.pop_back(); // removes last /back character from str
2str.erase(str.begin()); // removes first/front character from str

1#include<iostream>
2#include<algorithm>
3
4using namespace std;
5main() {
6   string my_str = "ABAABACCABA";
7
8   cout << "Initial string: " << my_str << endl;
9
10   my_str.erase(remove(my_str.begin(), my_str.end(), 'A'), my_str.end()); //remove A from string
11   cout << "Final string: " << my_str;
12}

1// string::erase
2#include <iostream>
3#include <string>
4
5int main ()
6{
7  std::string str ("This is an example sentence.");
8  std::cout << str << '\n';
9                                           // "This is an example sentence."
10  str.erase (10,8);                        //            ^^^^^^^^
11  std::cout << str << '\n';
12                                           // "This is an sentence."
13  str.erase (str.begin()+9);               //           ^
14  std::cout << str << '\n';
15                                           // "This is a sentence."
16  str.erase (str.begin()+5, str.end()-9);  //       ^^^^^
17  std::cout << str << '\n';
18                                           // "This sentence."
19  return 0;
20}