leshabook-air:Documents lesha$ gcc BYW6ngQt.c -o BY
BYW6ngQt.c:1:1: warning: type specifier missing, defaults to 'int'
      [-Wimplicit-int]
main(C,f,s,o,k){for(C=0;;++C,C&=63){for(k=o=f=99;k--;"057+5420"[C/8]>k?o...
^~~~
BYW6ngQt.c:1:1: error: too many parameters (5) for 'main': must be 0, 2, or 3
BYW6ngQt.c:1:1: error: second parameter of 'main' (argument array) must be of
      type 'char **'
BYW6ngQt.c:1:1: error: third parameter of 'main' (environment) must be of type
      'char **'
BYW6ngQt.c:1:196: warning: implicit declaration of function 'putchar' is invalid
      in C99 [-Wimplicit-function-declaration]
  ...putchar(s*((776-f?s*f&32767:k)+(C&2?s*o/2&32767:k))/299999));}}
     ^
2 warnings and 3 errors generated.

leshabook-air:Documents lesha$ gcc -v
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin14.0.0
Thread model: posix