Pointer-Based String Reverse

Hard Pointers PRO

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Problem Statement

Write a C++ program that reverses a string in-place using character pointer manipulation.

Input Format

A single word string S.

Output Format

Print reversed string.

Constraints

1 <= Length <= 50

Sample Input

PointerReverse

Sample Output

esreveRetnioP

Explanation

Swaps characters using start and end character pointers.

Starter Code

#include <iostream>
#include <string>
#include <algorithm>

void reverseString(char *str) {
    // Write your code here using pointers
}

int main() {
    std::string s;
    if (std::cin >> s) {
        std::vector<char> vec(s.begin(), s.end());
        vec.push_back('');
        reverseString(vec.data());
        std::cout << vec.data() << "n";
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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