View Compilation Error

0_0_11282601_22308.c:1:18: cstdio: No such file or directory
0_0_11282601_22308.c:2:19: cstring: No such file or directory
0_0_11282601_22308.c:3: error: syntax error before "namespace"
0_0_11282601_22308.c:5: error: syntax error before "flag"
0_0_11282601_22308.c: In function `dfs':
0_0_11282601_22308.c:15: error: `true' undeclared (first use in this function)
0_0_11282601_22308.c:15: error: (Each undeclared identifier is reported only once
0_0_11282601_22308.c:15: error: for each function it appears in.)
0_0_11282601_22308.c: In function `main':
0_0_11282601_22308.c:37: error: `EOF' undeclared (first use in this function)
0_0_11282601_22308.c:39: error: `false' undeclared (first use in this function)
0_0_11282601_22308.c:54: error: `true' undeclared (first use in this function)