How to reverse an std::string?

Question

Im trying to figure out how to reverse the string temp when I have the string read in binary numbers

istream& operator >>(istream& dat1d, binary& b1)    
{              
    string temp; 

    dat1d >> temp;    
}

Solution

I'm not sure what you mean by a string that contains binary numbers. But for reversing a string (or any STL-compatible container), you can use std::reverse(). std::reverse() operates in place, so you may want to make a copy of the string first:

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

int main()
{
    std::string foo("foo");
    std::string copy(foo);
    std::cout << foo << '\n' << copy << '\n';

    std::reverse(copy.begin(), copy.end());
    std::cout << foo << '\n' << copy << '\n';
}