Common Issue

If the content is printed out

#Output

#ErrorOutput
/usr/lib/gcc/i686-w64-mingw32/6.3-win32/../../../../i686-w64-mingw32/lib/../lib/libmingw32.a(lib32_libmingw32_a-crt0_c.o): In function `main':
./mingw-w64-crt/crt/crt0_c.c:18: undefined reference to `WinMain@16'
collect2: error: ld returned 1 exit status

It means there is no syntax error.