How to reverse a string in C, C++ without using library std::reverse function.

It is more like interview question then used in daily programming. There are multiple ways to do that and one of them is listed here :

#include <iostream>
#include <conio.h>
#include <string>

using namespace std;

void reverse_string(char *str)
{
  int len = strlen(str) - 1;
  char temp;

  for (int i = 0; i <= len / 2; ++i)
  {
    temp = str[i];
    str[i] = str[len - i];
    str[len - i] = temp;
  }
}

void main()
{
  char str[] = "How to reverse a string";
  
  cout << "Before :" << str << endl;
  reverse_string(str);
  cout << "After :" << str << endl;
  _getch();
}

Leave comments if you have any suggestions.
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