View Compilation Error

0_0_37818432_15410.cpp: In function 'int main()':
0_0_37818432_15410.cpp:158:8: error: expected unqualified-id before '[' token
   auto [res, x] = Simplex(A, b, c);
        ^
0_0_37818432_15410.cpp:159:36: error: 'x' was not declared in this scope
   printf("Case #%d: %.10f\n", cas, x[0]);
                                    ^