View Compilation Error

0_0_11126297_32744.c:2:21: algorithm: No such file or directory
0_0_11126297_32744.c:3:17: queue: No such file or directory
0_0_11126297_32744.c:5: error: syntax error before "namespace"
0_0_11126297_32744.c:12: error: syntax error before "friend"
0_0_11126297_32744.c:16: error: syntax error before '<' token
0_0_11126297_32744.c: In function `dijkstra':
0_0_11126297_32744.c:67: error: `Q' undeclared (first use in this function)
0_0_11126297_32744.c:67: error: (Each undeclared identifier is reported only once
0_0_11126297_32744.c:67: error: for each function it appears in.)
0_0_11126297_32744.c:70: error: `node' undeclared (first use in this function)
0_0_11126297_32744.c:70: error: syntax error before "now"
0_0_11126297_32744.c:71: error: `now' undeclared (first use in this function)
0_0_11126297_32744.c:92: error: syntax error before "next"
0_0_11126297_32744.c:93: error: `next' undeclared (first use in this function)