View Compilation Error

0_0_9381691_14021.c:18: error: syntax error before '&' token
0_0_9381691_14021.c: In function `InitStack':
0_0_9381691_14021.c:19: error: `S' undeclared (first use in this function)
0_0_9381691_14021.c:19: error: (Each undeclared identifier is reported only once
0_0_9381691_14021.c:19: error: for each function it appears in.)