View Compilation Error

0_0_6561386_2807.c:26: error: syntax error before "Collinear"
0_0_6561386_2807.c:31: error: syntax error before "Left"
0_0_6561386_2807.c:36: error: syntax error before "Xor"
0_0_6561386_2807.c:36: error: syntax error before "x"
0_0_6561386_2807.c: In function `Xor':
0_0_6561386_2807.c:38: error: `x' undeclared (first use in this function)
0_0_6561386_2807.c:38: error: (Each undeclared identifier is reported only once
0_0_6561386_2807.c:38: error: for each function it appears in.)
0_0_6561386_2807.c:38: error: `y' undeclared (first use in this function)
0_0_6561386_2807.c: At top level:
0_0_6561386_2807.c:41: error: syntax error before "Between"
0_0_6561386_2807.c:53: error: syntax error before "Intersect"
0_0_6561386_2807.c: In function `Intersect':
0_0_6561386_2807.c:61: error: `true' undeclared (first use in this function)