View Compilation Error

0_0_9076818_6435.c: In function `cmp':
0_0_9076818_6435.c:7: error: `node' undeclared (first use in this function)
0_0_9076818_6435.c:7: error: (Each undeclared identifier is reported only once
0_0_9076818_6435.c:7: error: for each function it appears in.)
0_0_9076818_6435.c:7: error: syntax error before ')' token
0_0_9076818_6435.c:7: error: syntax error before ')' token