View Compilation Error

232869_0_2668.c:4: error: syntax error before "f"
232869_0_2668.c: In function `dfs':
232869_0_2668.c:17: error: `true' undeclared (first use in this function)
232869_0_2668.c:17: error: (Each undeclared identifier is reported only once
232869_0_2668.c:17: error: for each function it appears in.)
232869_0_2668.c: In function `main':
232869_0_2668.c:28: error: `false' undeclared (first use in this function)