erase string c 2b 2b

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

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}

1#include <iostream>
2#include <algorithm>
3#include <string>
4 
5int main()
6{
7    std::string s = "This is an example";
8    std::cout << s << '\n';
9 
10    s.erase(0, 5); // Erase "This "
11    std::cout << s << '\n';
12 
13    s.erase(std::find(s.begin(), s.end(), ' ')); // Erase ' '
14    std::cout << s << '\n';
15 
16    s.erase(s.find(' ')); // Trim from ' ' to the end of the string
17    std::cout << s << '\n';
18}

1#include<iostream>
2#include<string>
3
4using namespace std;
5int main()
6{
7   string text = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
8
9   cout << "Initial string: " << text << endl;
10
11   text.erase(10, string::npos);
12  // string.erase(pos1, pos2) removes the part of the string between position 1 and 2.
13  // In this case, between character 10 and the end of the string.
14
15   cout << "Final string: " << text;
16}

1 string& erase (size_t pos = 0, size_t len = npos);
2/*
3pos
4Position of the first character to be erased.
5If this is greater than the string length, it throws out_of_range.
6Note: The first character in str is denoted by a value of 0 (not 1).
7len
8Number of characters to erase (if the string is shorter, as many characters as possible are erased).
9A value of string::npos indicates all characters until the end of the string.
10*/