Question

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Rotate a string in c++?
How to rotate a std::string?

I am making a application in c++ that works with Command line input. I am entering a string in to the command line

    int main(int argc, char** argv)
    {
        if(argc != 2)
        {
             cerr << "Invalid number of CMD arguments" << endl;
             return 1;
        }

        string StringValue = argv[1];
        cout << StringValue << endl;
     }

This work’s fine. Now i want to loop the character in the string.
Example: if i enter the word “STATES”.

    ^STATES|
    |^STATES
    S|^STATE
    ES|^STAT
    TES|^STA
    ATES|^ST
    TETES|^S
    STATES|^

Where “^” was the start and “|” the end. how do i do this?

Answer 1

use std::rotate http://www.cplusplus.com/reference/algorithm/rotate/

string foo = "abcdefg";
std::rotate(foo.begin(), foo.begin() + 3, foo.end());
cout << foo << endl; //prints defgabc