Brainfuck interpreter in C.

bf.c

char*c="code",*z="input",d['u0']={0};
main(r,i,k){char*p=d;int s['~']={k=r=0},*l=s;while(i=c[r++])k?i==91?++k:i==93?k?--k:--k:0:(i==93?*p?r=*l:l--:i==91?*p?*++l=r:++k:0,p+=i==62,p-=i==60,i==46?putchar(*p):0,*p-=i==45,i==44?*p=*z++:0,*p+=i==43);}

whitespacebf.c

// Whitespace version below:
char*c="code",*z="input",d['u0']={0};
main(r,i,k)
{
	char*p=d;
	int s['~']={k=r=0},*l=s;
	while(i=c[r++])
		k?i==91?++k:i==93?k?--k:--k:0:(
			i==93?*p?r=*l:l--:
			i==91?*p?*++l=r:++k:0,
			p+=i==62,
			p-=i==60,
			i==46?putchar(*p):0,
			*p-=i==45,
			i==44?*p=*z++:0,
			*p+=i==43);
}