View Compilation Error

0_0_36900030_27067.cpp:4:22: error: 'add' function uses 'auto' type specifier without trailing return type
 auto add(int x, int y) {
                      ^
0_0_36900030_27067.cpp:4:22: note: deduced return type only available with -std=c++1y or -std=gnu++1y