replace line breaks in a STL string

Question

how can i replace "\r\n" in an std::string

Answer 1

See Boost String Algorithms library.

Answer 2

First use find() to look for "\r\n", then use replace() to put something else there. Have a look at the reference, it has some examples:

http://www.cplusplus.com/reference/string/string/find.html

http://www.cplusplus.com/reference/string/string/replace.html

Answer 3

Use this :

    while ( str.find ("\r\n") != string::npos )
    {
     str.erase ( str.find ("\r\n"), 2 );
    }

more efficient form is :

    string::size_type pos = 0; // Must initialize
    while ( ( pos = str.find ("\r\n",pos) ) != string::npos )
    {
     str.erase ( pos, 2 );
    }

Answer 4

don't reinvent the wheel, Boost String Algorithms is a header only library and I'm reasonably certain that it works everywhere. If you think the accepted answer code is better because its been provided and you don't need to look in docs, here.

#include <boost/algorithm/string.hpp>
#include <string>
#include <iostream>

int main()
{
 std::string str1 = "\r\nsomksdfkmsdf\r\nslkdmsldkslfdkm\r\n";
 boost::replace_all(str1, "\r\n", "Jane");
 std::cout<<str1;
}

Answer 5

Depending upon your company's policies, boost might not be available. Visual Studio and most Linux distros come with Standard Template Library, so an STL option is equally valid to the boost option above.