View Compilation Error

0_0_32191175_21173.c:1:1: error: expected identifier or '(' before '/' token
 //#include <iostream.h>
 ^
0_0_32191175_21173.c:1:3: error: stray '#' in program
 //#include <iostream.h>
   ^
0_0_32191175_21173.c:2:18: fatal error: vector: No such file or directory
 #include <vector>
                  ^
compilation terminated.