Reverse a string in place. : char array « Data Types « C++ Tutorial

1. C++ Tutorial
2. Data Types
3. char array

#include <iostream> 
#include <cstring> 
using namespace std; 
 
int main() 
{ 
  char str[] = "this is a test"; 
  char *start, *end; 
  int len; 
  char t; 
 
  cout << "Original: " << str << "\n"; 
   
  len = strlen(str); 
 
  start = str; 
  end = &str[len-1]; 
 
  while(start < end) { 
    // swap chars 
    t = *start; 
    *start = *end; 
    *end = t; 
 
    // advance pointers 
    start++; 
    end--; 
  } 
 
 
  cout << "Reversed: " << str << "\n"; 
  return 0; 
}

Original: this is a test
Reversed: tset a si siht