View Compilation Error

0_0_2143339_6300.c:2:16: queue: No such file or directory
0_0_2143339_6300.c:3: error: syntax error before "namespace"
0_0_2143339_6300.c:19: error: syntax error before "operator"
0_0_2143339_6300.c: In function `main':
0_0_2143339_6300.c:29: error: `priority_queue' undeclared (first use in this function)
0_0_2143339_6300.c:29: error: (Each undeclared identifier is reported only once
0_0_2143339_6300.c:29: error: for each function it appears in.)
0_0_2143339_6300.c:29: error: syntax error before "Node"
0_0_2143339_6300.c:47: error: `Q' undeclared (first use in this function)