hpx::cout text in multiple lines

satyaki3794@satyaki3794-Inspiron-7520:~/Desktop/sudoku$ ./run2.sh
In file included from stubs/sudoku.hpp:15:0,
                 from sudoku.hpp:12,
                 from sudoku_client.cpp:14:
stubs/../server/sudoku.hpp:72:26: warning: missing terminating " character [enabled by default]
             hpx::cout << "Please enter the initial state of the board 
                          ^
stubs/../server/sudoku.hpp:72:13: error: missing terminating " character
             hpx::cout << "Please enter the initial state of the board 
             ^
stubs/../server/sudoku.hpp:73:59: warning: missing terminating " character [enabled by default]
             as a 9X9 matrix using 0 to denote empty cells." << hpx::endl;
                                                           ^
stubs/../server/sudoku.hpp:73:13: error: missing terminating " character
             as a 9X9 matrix using 0 to denote empty cells." << hpx::endl;
             ^
stubs/../server/sudoku.hpp: In member function ‘void sudoku::server::board::init_board(std::size_t)’:
stubs/../server/sudoku.hpp:73:13: error: ‘as’ was not declared in this scope
stubs/../server/sudoku.hpp:73:16: error: expected ‘;’ before ‘a’
             as a 9X9 matrix using 0 to denote empty cells." << hpx::endl;
                ^
stubs/../server/sudoku.hpp:74:36: error: ‘r’ was not declared in this scope
             for(boost::uint8_t r=0;r<9;r++){
                                    ^
stubs/../server/sudoku.hpp:74:43: error: expected ‘;’ before ‘)’ token
             for(boost::uint8_t r=0;r<9;r++){
                                           ^