0_0_10838592_7782.c:1:17: cstdio: No such file or directory 0_0_10838592_7782.c:2:18: cstring: No such file or directory 0_0_10838592_7782.c:3:19: iostream: No such file or directory 0_0_10838592_7782.c:4: error: syntax error before "namespace"