Reverses the order of the elements in the range [first,last).

Example

#include <algorithm>
#include <iostream>

using namespace std;
int main()
{
    string str("Hello");
    cout<<"Original String : "<<str<<endl;
    reverse(str.begin(), str.end());
    cout<<"Reversed String : "<<str<<endl;
    getchar();
    return 0;
}

Output

Original String : Hello
Reversed String : olleH