How to reverse an std::string?

c++ string binary reverse
Kameron Spruill picture Kameron Spruill · Feb 10, 2011 · Viewed 138.1k times · Source

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;    
}

Answer

Max Lybbert picture Max Lybbert · Feb 10, 2011

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';
}

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