Main.cc: In function 'int main()': Main.cc:22:12: error: unable to find string literal operator 'operator""a' with 'const char [2]', 'long unsigned int' arguments cout<>" "a; ^ Main.cc:26:12: error: unable to find string literal operator 'operator""b' with 'const char [2]', 'long unsigned int' arguments cout<>" "b; ^