View Compilation Error

632922_0_0_28689.c:3: error: syntax error before '&' token
632922_0_0_28689.c: In function `s':
632922_0_0_28689.c:3: error: `b' undeclared (first use in this function)
632922_0_0_28689.c:3: error: (Each undeclared identifier is reported only once
632922_0_0_28689.c:3: error: for each function it appears in.)
632922_0_0_28689.c:3: error: `x' undeclared (first use in this function)
632922_0_0_28689.c:3: error: `y' undeclared (first use in this function)
632922_0_0_28689.c:3: error: `a' undeclared (first use in this function)