gistfile1.c

#if 0
/* o_tannenbaum takes a single integer as its argument */
main(int l,char **O){int(*l0)()=main;l<-1?putchar(
l==- 10?(10<<1)+1<<1:l==- 11?0x10<<1:10):l==- 1
?l=(**++O- ((10<<1<<1)+010))* (* (* O+1)==0?1:10)
+(* (* O+1)==0?0:* (* O+1)- ((10<<1<<1)+010)):
**++O>=(10<<1<<1)+010?**O=l0(- 1,O- 1)+1>>1,
**-- O=**(O+1)- 1,l0(0,O):** --O<0?l==0?**++O
>>=1,l0(++l,-- O):l>**++O?l0(- 10,0),l0(- 010,0):
(l0(- 11,0),l0(++l,-- O)):(l>** O?l>**++O?l0(- 010,0),
++**O,--**-- O,l0(0,O): (l0(- 10,0), l0(++l,--O)):
(l0(- 11,0), l0(++l,O)));}
#endif

int main(int argc, char **argv) {
	char width, left, right;
	int l;
	// the following code parses the argument
	width = argv[1][0] - '0';

	if (argv[1][1]) // two-digit argument
		width = width * 10 + argv[1][1]-'0';

	right = (width - 1) / 2;

	for (left = right - 1; left >= 0; left--) {
		for (l = 0; l <= right; l++)
			putchar(l > left ? '*' : ' ');
		putchar('\n');
		right++;
	}

	right /= 2;
	for (l = 0; l <= right; l++)
		putchar(' ');
	// we're done, draw the last star and return
	putchar('*');
	putchar('\n');
}