shithub: util

ref: 6ab15be07c62e3d31c916084a377ff3b6ba7d0ad
dir: /round.c/

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#include <u.h>
#include <libc.h>

float round(float in) {
	float f;

	f = fmod(in, 1.0);

	if (in > 0) {
		if (f < 0.5)
			return floor(in);
		return ceil(in);
	}

	if (f > -0.5)
		return ceil(in);
	return floor(in);
}

void main() {
	char buf[1024];
	int r;
	float f;

	r = read(0, buf, sizeof(buf));
	if (r <= 0)
		return;

	buf[r] = '\0';

	f = round(atof(buf));

	print("%f\n", f);
}