View Compilation Error

0_0_1746250_6547.c:9: error: syntax error before "dfs"
0_0_1746250_6547.c: In function `dfs':
0_0_1746250_6547.c:20: error: `true' undeclared (first use in this function)
0_0_1746250_6547.c:20: error: (Each undeclared identifier is reported only once
0_0_1746250_6547.c:20: error: for each function it appears in.)
0_0_1746250_6547.c:24: error: `false' undeclared (first use in this function)