View Compilation Error

0_0_38021281_8169.cpp: In function 'void show(int)':
0_0_38021281_8169.cpp:78:18: error: expected unqualified-id before '[' token
             auto [node,left,right] = que[i];
                  ^
0_0_38021281_8169.cpp:79:56: error: 'node' was not declared in this scope
             printf("%4d%4d%4d%4d%4d -",left,right,tree[node].pref,tree[node].maxlen,tree[node].suff);
                                                        ^
0_0_38021281_8169.cpp:81:35: error: invalid operands of types 'std::ios_base&(std::ios_base&)' and 'std::ios_base&(std::ios_base&)' to binary 'operator+'
                 int mid = (left + right) / 2;
                                   ^