When you compile the source code you get a warning, compiler detected that a space is needed between a literal and string macro because a compiler error might occur in later C++ standards.
[Warning]
invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
When you compile the source code you get a warning, compiler detected that a space is needed between a literal and string macro because a compiler error might occur in later C++ standards.
[Warning] invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]