View Compilation Error

0_0_23235184_20376.cpp: In function 'int main()':
0_0_23235184_20376.cpp:29:24: error: unable to find string literal operator 'operator""x'
                 printf("%.2lf "x);
                        ^
0_0_23235184_20376.cpp:42:24: error: unable to find string literal operator 'operator""y'
                 printf("%.2lf "y);
                        ^