View Compilation Error

0_0_34424458_8369.cpp: In function 'int main()':
0_0_34424458_8369.cpp:18:30: error: expected primary-expression before ':' token
                 (x == 1 ? -- : ++)not_match;
                              ^
0_0_34424458_8369.cpp:18:34: error: expected primary-expression before ')' token
                 (x == 1 ? -- : ++)not_match;
                                  ^