#define a /*#<?phpecho "\010Hello, world!\n";// 2> /dev/null > /dev/null \ ;// 2> /dev/null; x=a;$x=5; // 2> /dev/null \ ;if (($x))// 2> /dev/null; thenreturn 0;// 2> /dev/null; fi#define e ?>#define b */#include <stdio.h>#define main() int main(void)#define printf printf(#define true )#define functionfunction main(){ printf "Hello, world!\n"true/* 2> /dev/null | grep -v true*/; return 0;}#define c /* main#*/