View Compilation Error

0_0_13486010_10708.cpp:110:71: error: macro "zero" passed 2 arguments, but takes just 1
     if (zero(s1 - s2) && zero(s1 - s3) && zero(s1 - s4) && zero(s5, s6)) return 1;
                                                                       ^
0_0_13486010_10708.cpp: In function 'int gao(pp, pp, pp, pp)':
0_0_13486010_10708.cpp:110:60: error: 'zero' was not declared in this scope
     if (zero(s1 - s2) && zero(s1 - s3) && zero(s1 - s4) && zero(s5, s6)) return 1;
                                                            ^