putint

putint.c

inline void putint(int n)
{
	static char buf[20];
	register int pos;
	register int x = n;
	if (x == 0) {
		putchar('0');
		return;
	}
	if (x == INT_MIN) { // x = -x do not work for the minimal value of int, so process it first
		printf("%d", x);
	}
	if (x < 0) {
		putchar('-');
		x = -x;
	}
	pos = 0;
	while (x > 0) {
		buf[pos] = x % 10 + '0';
		x /= 10;
		pos++;
	}
	pos--;
	while (pos >= 0) {
		putchar(buf[pos]);
		pos--;
	}
}