View Compilation Error

0_0_6561367_24718.c:33: error: syntax error before "Collinear"
0_0_6561367_24718.c:38: error: syntax error before "Left"
0_0_6561367_24718.c:43: error: syntax error before "Xor"
0_0_6561367_24718.c:43: error: syntax error before "x"
0_0_6561367_24718.c: In function `Xor':
0_0_6561367_24718.c:45: error: `x' undeclared (first use in this function)
0_0_6561367_24718.c:45: error: (Each undeclared identifier is reported only once
0_0_6561367_24718.c:45: error: for each function it appears in.)
0_0_6561367_24718.c:45: error: `y' undeclared (first use in this function)
0_0_6561367_24718.c: At top level:
0_0_6561367_24718.c:48: error: syntax error before "Between"
0_0_6561367_24718.c:60: error: syntax error before "Intersect"
0_0_6561367_24718.c: In function `Intersect':
0_0_6561367_24718.c:68: error: `true' undeclared (first use in this function)