View Compilation Error

0_0_6457069_15242.c:3:20: iostream: No such file or directory
0_0_6457069_15242.c:4:17: queue: No such file or directory
0_0_6457069_15242.c:5:19: cstring: No such file or directory
0_0_6457069_15242.c:6: error: syntax error before "namespace"
0_0_6457069_15242.c: In function `bfs':
0_0_6457069_15242.c:22: error: `queue' undeclared (first use in this function)
0_0_6457069_15242.c:22: error: (Each undeclared identifier is reported only once
0_0_6457069_15242.c:22: error: for each function it appears in.)
0_0_6457069_15242.c:22: error: `list' undeclared (first use in this function)
0_0_6457069_15242.c:22: error: `ss' undeclared (first use in this function)
0_0_6457069_15242.c:56: error: syntax error before '/' token