calc exp nha, Java

calc exp nha

//calc exp
import java.util.Calendar;

class Rextester
{  
    public static void main(String args[])
    {
        calc(   have,   need   );
    }

public static void calc(int have, int need){
Calendar now = Calendar.getInstance();
int gio, phut, gioNow, phutNow, gioDone, phutDone;
need*=1000;
gio = need/ have / 12 / 60;
phut = (need/ have / 12) % 60;
gioNow = now.get(Calendar.HOUR_OF_DAY) % 12 ;
phutNow = now.get(Calendar.MINUTE);
if(gioNow < 7)
gioNow = gioNow + 5;
else
gioNow = gioNow - 7;
gioDone = (gioNow + gio) % 12;
phutDone = phutNow + phut;
if(phutDone >=60){
gioDone++;
if(gioDone > 12)
gioDone = gioDone % 12;
phutDone = phutDone - 60;
}
System.out.println("Cần: " + gio + " giờ, " + phut + " phút");
System.out.println("Xong: " + gioDone + " giờ, " + phutDone + " phút");
if(gio >= 10){
float tenHourExp = have * 12 * 60 * 10;
float phanTram = (tenHourExp / need) * 100;
gioDone = (gioNow + 10) % 12;
System.out.println("\nSau 10 tiếng: " + gioDone + " giờ, " + phutNow + " phút");
System.out.println("Được: " + (int)phanTram + '%' + '(' + (int)tenHourExp + '/' + need + ')');
}
}
}


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