View Compilation Error

0_0_6764800_30004.c:7: error: syntax error before "acosl"
0_0_6764800_30004.c: In function `acosl':
0_0_6764800_30004.c:24: error: syntax error before '{' token
0_0_6764800_30004.c:63: error: parameter `ans' is initialized
0_0_6764800_30004.c:63: error: `hori' undeclared (first use in this function)
0_0_6764800_30004.c:63: error: (Each undeclared identifier is reported only once
0_0_6764800_30004.c:63: error: for each function it appears in.)
0_0_6764800_30004.c:63: confused by earlier errors, bailing out