Question:

Reverse a String with C++

Summary

The the below code we defines a class Solution with a method reverseWord that takes a string str as input and reverses its characters in place.

The function uses a two-pointer approach, starting from the beginning (s) and end (e) of the string, swapping characters iteratively until the pointers meet in the middle.

Solution:

//User function Template for C++

class Solution

{

public:

string reverseWord(string str)

{

// Your code goes here

int s=0;

int e=str.size()-1;

while(s<e){

swap(str[s++],str[e--]);

}

return str;

}

};

Explanation:

The function reverseWord reverses the characters of the input string str in place.
Two pointers (s and e) are initialized at the beginning and end of the string, respectively.
The while loop continues until the start pointer (s) is less than the end pointer (e).
Inside the loop, characters at the start and end positions are swapped using swap.
Both pointers are incremented and decremented, moving towards the center of the string.
The reversed string is then returned.