View Compilation Error

22132_0_14504.c: In function `main':
22132_0_14504.c:19: error: `node' undeclared (first use in this function)
22132_0_14504.c:19: error: (Each undeclared identifier is reported only once
22132_0_14504.c:19: error: for each function it appears in.)
22132_0_14504.c:19: error: syntax error before "a"
22132_0_14504.c:31: error: `a' undeclared (first use in this function)
22132_0_14504.c:107: error: syntax error before '/' token
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