ex2_6.java

判断三角形

//2.6(求各数位的和)

import javax.swing.JOptionPane;
public class Ex2_6 {
    public static void main(String[] args) {
     String strnumber;
     int number,sum=0;
     strnumber=JOptionPane.showInputDialog("请输入要求和的数字:");
     number=Integer.parseInt(strnumber);
     if((number<0)||(number>1000)){
         JOptionPane.showMessageDialog(null, number+"输入有误");
         System.exit(0);
     }
     while(number!=0){
         sum=sum+number%10;   //num%10可以得到每位的数字
         number=number/10;
     }
    JOptionPane.showMessageDialog(null, "该数字各数位的和为："+sum,"Ex2_6",
    JOptionPane.INFORMATION_MESSAGE);
    System.exit(0);
}
}