@@ -22,17 +22,11 @@ clamp(int val, int min, int max)

 	return (val >= min) ? (val <= max) ? val : max : min;

 }

-int

-cinu(char c)

-{

-	return c >= '0' && c <= '9';

-}

-

 int

 sint(char *s)

 {

 	int i = 0, num = 0;

-	while(s[i] && cinu(s[i]))

+	while(s[i] && s[i] >= '0' && s[i] <= '9')

 		num = num * 10 + (s[i++] - '0');

 	return num;

 }

@@ -41,17 +35,17 @@ int

 main(int argc, char *argv[])

 {

 	int seg, offset, i;

-	double segf;

+	double segf, cx = 128, cy = 128, r;

 	if(argc < 2) {

-		printf("usage: circle128 length\n", argc);

+		printf("usage: circle128 length [radius]\n", argc);

 		return 1;

 	}

 	seg = sint(argv[1]);

 	segf = (double)seg;

 	offset = seg / 4;

-	printf("%d points on a circle128:\n\n", seg);

+	r = argc < 3 ? 128 : (double)sint(argv[2]);

+	printf("%d points on a circle%d:\n\n", seg, (int)r);

 	for(i = 0; i < seg; ++i) {

-		double cx = 128, cy = 128, r = 128;

 		double pos = (i - offset) % seg;

 		double deg = (pos / segf) * 360.0;

 		double rad = deg * (PI / 180);