Searching for newline '\n' character within a string object

Question

I have a string object of the general form string line = "yadayada\nyadaya". I loop through the string as below trying to "catch" the newline character.

        for (int i = 1; i < line.length(); i++)
        {
             if ( ( line[i]== ' \ ') && ( line[i+1] == 'n' ) ) 
             {
                  buffer.insertChar('\n');
                  i = i+2;
             }
             else
             {

                  buffer.insertChar(line[i]);
             }

        }

As you can see i loop through the string characters and i am inserting the characters one by one in another object called buffer (irrelevant to the question).

In the first if if ( ( line[i]== ' \ ') && ( line[i+1] == 'n' ) ) i am trying to "catch" the newline character and inside that if body i am incrementing the index i by two so that it will skip the characters '\' and 'n' in the next loop. The problem is that this loop never catches a newline character but always inserts in the buffer the two individual characters '\' and 'n' .

Important Note: I start the loop with index i = 1 because the first character acts like a command and is being treated specially.

Update: I modified the above code but still no luck with what i am trying to accomplish

                for (int i = 1; i < line.length(); i++)
                {
                    if ( (line[i]== '\n') )   
                    {

                        buffer.insertChar('\n');
                        i = i+1;
                    }
                    else
                    {

                        buffer.insertChar(line[i]);
                    }

                }

Update # 2 : If that helps the string is being originated from input of the user like below:

string line;
getline(cin,line);

Answer 1

"\n" is not a string containing a \ followed by an n. The escape sequence \n denotes a single character, which you can look for with

for (size_t i = 0; i < line.length(); i++)
     if (line[i] == '\n')
         // whatever

or with good old std::string::find.

Answer 2

Instead of ( line[i]== ' \ ') && ( line[i+1] == 'n' ), try

if ( line[i]== '\n')

and

i = i+1;