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

#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 
  cout << "Reversed: " << str << "\n"; 
  return 0; 
Original: this is a test
Reversed: tset a si siht

2.20.char array
2.20.1.char array buffers
2.20.2.initialized string
2.20.3.Treating character arrays as strings.
2.20.4.Get line with buffer size for char array reading
2.20.5.Use cin.get() to read a string based on char array
2.20.6.Reverse case using array indexing.
2.20.7.Reverse a string in place.
2.20.8.Copying a string using array notation
2.20.9.Copying a string using pointer notation
2.20.10.Initializing char pointers with strings
2.20.11.Using an array of pointers to char
2.20.12.simple string variable
2.20.13.reads multiple lines, terminates on '$' character
2.20.14.reads string with embedded blanks
2.20.15.Read from keyboard and output char array
2.20.16.multidimensional char arrays