View Compilation Error

0_0_15973904_24099.cpp: In function 'int dcmp(double)':
0_0_15973904_24099.cpp:55:1: error: 'else' without a previous 'if'
 else return x < 0 ? -1 : 1;
 ^
0_0_15973904_24099.cpp: In function 'int calc(double, double)':
0_0_15973904_24099.cpp:138:38: error: 'cros' was not declared in this scope
 if(   cross(t[i].c-t[i].a, p-t[i].a)*cros
                                      ^
0_0_15973904_24099.cpp:138:38: error: expected ')' at end of input
0_0_15973904_24099.cpp:138:38: error: expected statement at end of input
0_0_15973904_24099.cpp:138:38: error: expected '}' at end of input
0_0_15973904_24099.cpp:138:38: error: expected '}' at end of input