foo.cpp: In function 'bool check(int)':
foo.cpp:37:37: error: expected primary-expression before '?' token
                        l[a[i].res] >?= a[i].l;
                                     ^
foo.cpp:37:38: error: expected primary-expression before '=' token
                        l[a[i].res] >?= a[i].l;
                                      ^
foo.cpp:37:46: error: expected ':' before ';' token
                        l[a[i].res] >?= a[i].l;
                                              ^
foo.cpp:37:46: error: expected primary-expression before ';' token
foo.cpp:38:37: error: expected primary-expression before '?' token
                        r[a[i].res] <?= a[i].r;
                                     ^
foo.cpp:38:38: error: expected primary-expression before '=' token
                        r[a[i].res] <?= a[i].r;
                                      ^
foo.cpp:38:46: error: expected ':' before ';' token
                        r[a[i].res] <?= a[i].r;
                                              ^
foo.cpp:38:46: error: expected primary-expression before ';' token