View Compilation Error

0_0_21840976_21598.c:1:1: error: expected identifier or '(' before '/' token
 //#define _CRT_SECURE_NO_WARNINGS
 ^
0_0_21840976_21598.c:1:3: error: stray '#' in program
 //#define _CRT_SECURE_NO_WARNINGS
   ^
0_0_21840976_21598.c:2:19: fatal error: iostream: No such file or directory
 #include<iostream>
                   ^
compilation terminated.