第六次上机作业
1. 打印出所有的"水仙花数",所谓"水仙花数"是指一个三位数,其各位数字立方和等于该数本身。例如:153是一个"水仙花数",因为153=1的三次方+5的三次方+3的三次方。(知识点:循环语句、条件语句)
package one; public class text1 { public static void main(String[] args) { // TODO Auto-generated method stub for(int i=100;i<=999;i++){ int x=i%10; int y=i%100/10; int z=i/100; if(i==x*x*x+y*y*y+z*z*z){ System.out.println("输出的水仙花数是"+i); } } } }
2.
在控制台输出以下图形(知识点:循环语句、条件语句)
package one; public class text4 { public static void main(String[] args) { // TODO Auto-generated method stub for (int i = 1; i <= 6; i++) { for (int j = 1; j <= i; j++) { System.out.print(j); } System.out.print("\n"); } }
package one; public class text5 { public static void main(String[] args) { // TODO Auto-generated method stub for(int i=1;i<=6;i++) { for(int j=1;j<=7-i;j++) { System.out.print(j); } System.out.println(); } } } }
package one; public class text6 { public static void main(String[] args) { // TODO Auto-generated method stub for(int i=1;i<7;i++) { for (int k = 1; k <7-i ; k++) { System.out.print(" "); } for(int j=i;j>0;j--) { System.out.print(j); } System.out.println(); } } }
package one; public class text7 { public static void main(String[] args) { // TODO Auto-generated method stub for(int i=6;i>0;i--) { for(int k=0;k<6-i;k++) { System.out.print(" "); } for(int j=1;j<=i;j++) { System.out.print(j); } System.out.println(""); } } }
3. 输入年月日,判断这是这一年中的第几天(知识点:循环语句、条件语句)
package one; import java.util.Scanner; public class text2 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入年份"); int year=input.nextInt(); System.out.println("请输入月份"); int month=input.nextInt(); System.out.println("请输入几日"); int day=input.nextInt(); int count=0; int days=0; if(year>0&&month>0&&day>0&&month<13&&day<32){ for (int i=1;i<month;i++){ switch(i){ case 1: case 3: case 5: case 7: case 8: case 10: case 12: count+=31; System.out.println(days+"31"); break; case 4: case 6: case 9: case 11: count+=30; System.out.println(days+"30"); break; case 2: if((year%4==0&&year%1!=0)||(year%400==0)){ System.out.println(days+"29"); }else{ System.out.println(days+"28"); } break; } } count=count+day; } System.out.println(year+"年"+month+"月"+day+"日是"+year+"年的第"+ +count+"天"); } }
4.由控制台输入一个4位整数,求将该数反转以后的数,如原数为1234,反转后的数位4321(知识点:循环语句、条件语句)
package one; import java.util.Scanner; public class text3 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入四位整数"); int num=input.nextInt(); int []score=new int[4]; for(int i=0;i<score.length;i++){ score[i]=num%10; num=num/10; } System.out.println(score[0]*1000+score[1]*100+score[2]*10+ score[3]); } }