- Code:
package LanTHdau;
import java.text.DecimalFormat;
import java.util.Scanner;
public class chuvidientichbankinh {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
int r;
System.out.println("Copy right ©: Nguyễn Hoàng Phúc NCTH5B");
System.out.println("Please input radius :");
r=sc.nextInt();
DecimalFormat fmt=new DecimalFormat("0.##");
double pe = Math.PI*Math.pow(r,2);
System.out.println("Perimeter is:"+" "+ fmt.format(pe));
double ac = 2*Math.PI*r;
DecimalFormat fmt1=new DecimalFormat("0.##");
System.out.println("Acreage is"+" "+ fmt1.format(ac));
}
}
Chu vi diện tích với if
- Code:
package LamThem;
import java.text.DecimalFormat;
import java.util.Scanner;
public class chhuvidienichvoiif {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
System.out.println("Copy right ©: Nguyễn Hoàng Phúc NCTH5B");
int r;
System.out.println("Please input radius :");
r=sc.nextInt();
if (r<0) {
System.out.println("Sory, The radius can't be a negative number. It must be a positive number.Please try again.");
}
else {
DecimalFormat fmt=new DecimalFormat("0.##");
double pe = Math.PI*Math.pow(r,2);
System.out.println("Perimeter is:"+" "+ fmt.format(pe));
double ac = 2*Math.PI*r;
DecimalFormat fmt1=new DecimalFormat("0.##");
System.out.println("Acreage is"+" "+ fmt1.format(ac));
}
}
}
Chu vi diện tích với while
- Code:
package LamThem;
import java.text.DecimalFormat;
import java.util.Scanner;
public class chuvidientichvoiwhile {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
int r;
System.out.println("Copy right ©: Nguyễn Hoàng Phúc NCTH5B");
System.out.println("Please input radius :");
r=sc.nextInt();
while (r>=0) {
DecimalFormat fmt=new DecimalFormat("0.##");
double pe = Math.PI*Math.pow(r,2);
System.out.println("Perimeter is:"+" "+ fmt.format(pe));
double ac = 2*Math.PI*r;
DecimalFormat fmt1=new DecimalFormat("0.##");
System.out.println("Acreage is"+" "+ fmt1.format(ac));
break;
}
}
}