Apr 23, 2025 · In C++, we can reverse a string in various different ways as show below: C++ STL provides a built-in function reverse (), which can be used to reverse the string efficiently. Example. Time Complexity: O (n), where n is the length of string.

Mar 19, 2025 · Reverse a String in C++. C++ STL provides the std::reverse() method that reverses the order of elements in the given range. We can use this function to reverse the string by passing the iterators to the beginning and the end of the string. This method is defined inside <algorithm> header file. Syntax . std::reverse (str.begin(), str.end());

Jan 10, 2025 · The strrev() function is a built-in function in C and is defined in string.h header file. The strrev() function is used to reverse the given string. Syntax: char *strrev(char *str); Parameter: str: The given string which is needed to be reversed. Returns: This function doesn’t return anything but the reversed string is stored in the same string.

Jun 5, 2013 · I'm trying to reverse a string using the function strrev(). I know that strrev returns a pointer to the reversed string so I simply initialize an already allocated string with same size as the original one with the strrev function return.

Apr 21, 2025 · The simplest way to reverse a string in C++ is to use the std::reverse function from the <algorithm> library. This function takes two iterators as arguments, the beginning and the end of the range to be reversed. Example:

Apr 18, 2016 · strrev is a deprecated function, which was only available in Microsoft toolchain and should not be used. You can reverse string with std::reverse.

Nov 24, 2012 · std::string reverse_string(std::string &str) { const char*buf = str.c_str(); char *start = const_cast<char*>(buf); char *end = start + strlen(buf) - 1; char t; while(start < end) { t = *start; *start = *end; *end = t; start ++; end --; } str = buf; return str; }

Nov 25, 2022 · First way – Using reverse function example. There is a built-in function reverse() that you may use to reverse a string in C++. This is defined in the algorithm header file that you have to include in the C++ file. The reverse function takes two parameters as shown in …

Feb 5, 2025 · Learn multiple methods for reversing a string in C++, from basic manual approaches (like loops, recursion, stacks) to using STL (Standard Template Library) functions, and compare their performance. In programming, string reversal involves flipping the order of characters to achieve a reversed output.

Table of contents / Different ways to reverse a string in C++: Method 1: Swapping individual characters of a string; Method 2: Using prebuilt functions; Method 3: Using an extra space or array to store; Method 4: Pointer approach; Method 5: Using stack data structure; Method 6: Using Vector data structure; Method 1: Swapping individual ...