第五周上机练习

package task1;
import java.util.*;
public class q {
    public static void main(String[] args) {

        int g,s,b,x;
         
        for(x=100;x<=999;x++){
            b=x/100;
            s=x/10%10;
            g=x%10;
        if(g*g*g+s*s*s+b*b*b==x)
            System.out.println(x);
        }
}
}

 

 

package task1;
import java.util.*;
public class q {
    public static void main(String[] args) {
          for(int i=1;i<=6;i++){
              for(int j=1;j<=i;j++){
                  System.out.print(j);
              }
                  System.out.println();
            }  
    }
}

 

package task1;
import java.util.*;
public class q {
    public static void main(String[] args) {
          for(int i=1;i<=6;i++){
              for(int j=1;j<=(7-i);j++){
                  System.out.print(j);
              }
                  System.out.println();
            }  
    }
}

 

 

 

package task1;
import java.util.*;
public class q {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("年");
        int n=input.nextInt();
        System.out.println("月");
        int y=input.nextInt();
        System.out.println("日");
        int r=input.nextInt();
        int t=0;
        for(int i=1;i<y;i++){
            switch(i){
            case 4:
            case 6:
            case 9:
            case 11:
                t+=30;
                break;
            case 2:
                if(n%4==0&&n%100!=0||n%400==0){
                    t+=29;
                }else{
                    t+=28;
                }
                break;
            default:
                t+=31;
                break;
            }
        }
        t+=r;
        System.out.println("这天是第"+t+"天");
    }
}

 

 

package task1;
import java.util.*;
public class q {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("输入一个四位数");
        int a=input.nextInt();
        int g,s,b,q;
        g=a%10;
        s=a/10%10;
        b=a/100%10;
        q=a/1000;
        System.out.println("反转后的四位数是"+g+s+b+q);
                }          
    }