View Compilation Error

1089674_0_0_29993.c: In function `cmp':
1089674_0_0_29993.c:13: error: `node' undeclared (first use in this function)
1089674_0_0_29993.c:13: error: (Each undeclared identifier is reported only once
1089674_0_0_29993.c:13: error: for each function it appears in.)
1089674_0_0_29993.c:13: error: syntax error before ')' token
1089674_0_0_29993.c:13: error: syntax error before ')' token
1089674_0_0_29993.c: In function `main':
1089674_0_0_29993.c:43: error: 'for' loop initial declaration used outside C99 mode