What does end1 mean in c++

In C, end1 is a member function of std::string, which returns an iterator pointing to the end of the string, but not including the end character.

In C, what does end1 mean?

end1 is a member function of std::string that returns an iterator pointing to the end of the string, but not including the end character.

Detailed explanation:

end1 function returns an iterator pointing to the character at the end of the string. This iterator is located after the last character of the string, so it cannot be used to access characters in the string. It is often used to determine the length of a string, or to traverse a string in conjunction with other iterators such as begin.

Example:

The following code example shows how to use the end1 function:

<code class="cpp">#include <iostream>
#include <string>

using namespace std;

int main() {
  string str = "Hello World";

  // 获取字符串末尾迭代器
  string::iterator it = str.end1();

  // 计算字符串长度
  cout << "String length: " << distance(str.begin(), it) << endl;

  return 0;
}</code>

Output:

<code>String length: 11</code>

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