0_0_13010582_25658.c:1:20: iostream: No such file or directory 0_0_13010582_25658.c:2:19: cstring: No such file or directory 0_0_13010582_25658.c:3:18: cstdio: No such file or directory 0_0_13010582_25658.c:5: error: syntax error before "namespace"