View Compilation Error

0_0_26847287_25809.cpp: In function 'int main()':
0_0_26847287_25809.cpp:7:20: error: unable to find string literal operator 'operator""a'
             printf("%d\n"a+b);
                    ^
0_0_26847287_25809.cpp:7:28: error: 'b' was not declared in this scope
             printf("%d\n"a+b);
                            ^