第五次上机作业
1. )
import java.util.*; public class jkk { public static void main(String[] args) { for(int i=100;i<1000;i++) { int ge=i%10; int shi=i/10%10; int bai=i/100; if(ge*ge*ge+shi*shi*shi+bai*bai*bai==i) { System.out.println(i); } } } }
2.
package calsswork; import java.util.Scanner; public class text1 { public static void main(String[] args) { for(int i=1;i<=7;i++) { for(int j=1;j<i;j++) { System.out.print(j); } System.out.println(); } } }
package hello;
import java.util.Scanner;
public class yes {
public static void main(String[] args) {
for(int i=6;i>=0;i--) {
for(int j=1;j<=i;j++) {
System.out.print(j);
}
System.out.println();
}
}
import java.util.Scanner;
public class yes {
public static void main(String[] args) {
for(int i=6;i>=0;i--) {
for(int j=1;j<=i;j++) {
System.out.print(j);
}
System.out.println();
}
}
package hello; import java.util.Scanner; public class yes { public static void main(String[] args) { Scanner sc=new Scanner(System.in); for(int a=1;a<7;a++) { for(int b=a;b>0;b--) { System.out.print(b); } System.out.println(); } } }
package hello; import java.util.Scanner; public class yes { public static void main(String[] args) { Scanner sc=new Scanner(System.in); for(int a=6;a>0;a--) { for(int b=0;b<6-a;b++) { System.out.print(" "); } for(int i=1;i<=a;i++) { System.out.print(i); } System.out.println(""); } } }
3.
package hello; import java.util.Scanner; public class yes { public static void main(String[] args) { int year; int mouth; int day = 0; int days; int d = 0; // 累计天数 int e = 0; Scanner scanner = new Scanner(System.in); //判断输入的年份和月份和日期是否错误 do { System.out.println("输入年:"); year = scanner.nextInt(); System.out.println("输入月:"); mouth = scanner.nextInt(); System.out.println("输入日:"); days = scanner.nextInt(); if (year < 0 || mouth < 0 || mouth > 12 || days < 0 || days > 31) { System.out.println("input error!"); e = 1; } } while (e == 1); for (int i = 1; i < mouth; i++) { switch (i) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: { day = 31; break; } case 4: case 6: case 9: case 11: { day = 30; break; } case 2: { if ((year % 100 != 0 && year % 4 == 0) || (year % 100 == 0 && year % 400 == 0)) { day = 29; } else { day = 28; } } default: break; } d += day; } System.out.println("这是" + year + "年的" + (d + days) + "天"); } }
4.
package hello; import java.util.Scanner; public class yes { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("请输入一个四位数"); int x=sc.nextInt(); int gewei=x%10; int shiwei=x%10/10; int baiwei=x%100/100; int qianwei=x/1000; System.out.println("原先的数为:"+x+"现在的为"+(qianwei+baiwei*10+shiwei*100+gewei*1000)); } }