View Compilation Error

0_0_4168557_18762.c: In function `Union':
0_0_4168557_18762.c:16: error: syntax error before '{' token
0_0_4168557_18762.c: At top level:
0_0_4168557_18762.c:20: error: syntax error before "else"
0_0_4168557_18762.c:23: error: `ry' undeclared here (not in a function)
0_0_4168557_18762.c:23: error: `y' undeclared here (not in a function)
0_0_4168557_18762.c:23: error: `x' undeclared here (not in a function)
0_0_4168557_18762.c:24: error: syntax error before "return"
0_0_4168557_18762.c:23: error: storage size of `sum' isn't known