View Compilation Error

0_0_13588766_8148.c:1:1: error: expected identifier or '(' before '/' token
 //#include <iostream>
 ^
0_0_13588766_8148.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_13588766_8148.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_13588766_8148.c: In function 'main':
0_0_13588766_8148.c:18:3: error: expected expression before '/' token
   //std::cin >> number;
   ^
0_0_13588766_8148.c:21:4: error: expected expression before '/' token
    //std::cin >> tmp;
    ^
0_0_13588766_8148.c:46:3: error: expected expression before '/' token
   //std::cin >> k;
   ^