zhyf · 发布于 2025-09-07 · 浏览 354 回复 0

double a, b, d;
scanf("%lf", &b);
int c;
c = b + 0.999999999;

if (0 <= c <= 20) {
	d = (double)c * 1.68;
}
if (c > 20) {
	d = (c - 20) * 1.98 + 20 * 1.68;
}
printf("%.2f", d);
return 0;