View Compilation Error

0_0_2886720_4872.c:1:19: iostream: No such file or directory
0_0_2886720_4872.c:2:16: queue: No such file or directory
0_0_2886720_4872.c:3: error: syntax error before "namespace"
0_0_2886720_4872.c: In function `BFS':
0_0_2886720_4872.c:17: error: `Node' undeclared (first use in this function)
0_0_2886720_4872.c:17: error: (Each undeclared identifier is reported only once
0_0_2886720_4872.c:17: error: for each function it appears in.)
0_0_2886720_4872.c:17: error: syntax error before "P"
0_0_2886720_4872.c:19: error: `N' undeclared (first use in this function)
0_0_2886720_4872.c:22: error: `queue' undeclared (first use in this function)
0_0_2886720_4872.c:22: error: `q' undeclared (first use in this function)
0_0_2886720_4872.c:42: error: `P' undeclared (first use in this function)
0_0_2886720_4872.c: In function `main':
0_0_2886720_4872.c:63: error: `EOF' undeclared (first use in this function)