View Compilation Error

0_0_29861515_29368.c:1:1: error: expected identifier or '(' before '/' token
 //#include <iostream>
 ^
0_0_29861515_29368.c:1:3: error: stray '#' in program
 //#include <iostream>
   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/_mingw.h:282:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/crtdefs.h:10,
                 from GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:9,
                 from 0_0_29861515_29368.c:2:
GCC4.9.2/x86_64-w64-mingw32/include/vadefs.h:29:11: error: unknown type name '__gnuc_va_list'
   typedef __gnuc_va_list va_list;
           ^
0_0_29861515_29368.c:5:1: error: expected identifier or '(' before '/' token
 //#include <algorithm>
 ^
0_0_29861515_29368.c:5:3: error: stray '#' in program
 //#include <algorithm>
   ^
0_0_29861515_29368.c:8:6: error: variably modified 'str1' at file scope
 char str1[maxn],str2[10005];
      ^