View Compilation Error

0_0_9454974_20903.c:1:21: iostream: No such file or directory
0_0_9454974_20903.c:5: error: syntax error before "namespace"
0_0_9454974_20903.c:84: error: syntax error before "namespace"
0_0_9454974_20903.c:88: error: redefinition of `struct node'
0_0_9454974_20903.c:93: error: redefinition of 'cmp'
0_0_9454974_20903.c:14: error: previous definition of 'cmp' was here
0_0_9454974_20903.c:106: error: redefinition of 'Dijkstra'
0_0_9454974_20903.c:27: error: previous definition of 'Dijkstra' was here
0_0_9454974_20903.c:128: error: redefinition of 'main'
0_0_9454974_20903.c:49: error: previous definition of 'main' was here