View Compilation Error

1054079_0_0_20311.c:1:19: iostream: No such file or directory
1054079_0_0_20311.c:2: error: syntax error before "namespace"
1054079_0_0_20311.c:4: error: syntax error before "hash"
1054079_0_0_20311.c:9: error: syntax error before "dfs"
1054079_0_0_20311.c: In function `dfs':
1054079_0_0_20311.c:11: error: `true' undeclared (first use in this function)
1054079_0_0_20311.c:11: error: (Each undeclared identifier is reported only once
1054079_0_0_20311.c:11: error: for each function it appears in.)
1054079_0_0_20311.c:12: error: `false' undeclared (first use in this function)
1054079_0_0_20311.c: In function `main':
1054079_0_0_20311.c:36: error: `cin' undeclared (first use in this function)
1054079_0_0_20311.c:53: error: `false' undeclared (first use in this function)