How to reverse a given string in c++

Question

Reverse the given string

Answer 1

// A Simple C++ program to reverse a string
#include <bits/stdc++.h>
using namespace std;

// Function to reverse a string
void reverseStr(string& str)
{
int n = str.length();

// Swap character starting from two
// corners
for (int i = 0; i < n / 2; i++)
swap(str[i], str[n - i - 1]);
}

// Driver program
int main()
{
string str = "geeksforgeeks";
reverseStr(str);
cout << str;
return 0;
}

Answer 2

One of many possible ways is
1.to copy the string to a placeholder.

2.go through reversed loop from the last element to the beginning of the string ... copy characters to the placeholder while doing this.

3.copy the placeholder to the original string .

Answer 3

Thanks a lot❤️

Answer 4

Can you give a small example with this reverse string....it will be very helpful for me .

Answer 5

ok , Nagaraj Arjun
here's an example :
string org = "012345678";

//index start at zero
int rlen = org.length() - 1;

string placeholder(len,len);

for(int x = rlen ; x >= 0; --x)
{
//(rlen = 8 , x = 8 ) = 0 , so on ..etc
placeholder[rlen-x] = org[x];
}
org = placeholder;
cout<<org<<endl;

if you find this answer useful please mark it ✔️

Answer 6

Once again thank you❤️❤️.It was very helpful ❤️