第五周java作业
上机:
1.(1) package shd;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int i = 1;
int sum=0;
while (i <= 100) {
if (i % 3== 0){
sum+=i;
}
i++;}
System.out.println(sum);
}
}
(2) package shd;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int i = 1;
int sum=0;
for(;i<=100;i++) {
if (i % 3== 0){
sum+=i;
}
}
System.out.println(sum);
}
}
(3) package shd;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int i = 1;
int sum=0;
do {
if (i % 3== 0){
sum+=i;
}
i++;
} while(i<=100);
System.out.println(sum);
}
}
2. package shd;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int i=1;
while(i<=9){
if(i!=5){
System.out.println(i);}
i++;
}
}
}
3. package shd;
import java.util.Scanner;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入一个数");
int x=input.nextInt();
int sum=1;
int y=1;
while(y<=x){
sum=sum*y;
y++;
}
System.out.println("sum="+sum);
}
}
4. package shd;
import java.util.Scanner;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入学生成绩");
int x=input.nextInt();
if(x<0||x>=100){
System.out.println("错误，请重新输入");
}else{
System.out.println("正确");}
}
}
5. package shd;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
double y=30000,x=1,sum=30000;
while(x<=10){
sum=sum+y;
y=y+(y*0.06);
x++;
}
System.out.println("第10年的工资是"+y);
System.out.println("总工资是"+sum);
}
}
作业：1. package shd;
public class lj5921 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int i = 100;
while (i <= 999) {
int a = i % 10;
int b = i / 10 % 10;
int c = i / 100;
if (a * a * a + b * b * b + c * c * c == i)
System.out.println(i);
i++;
}
}
}
2.
package Home; import java.util.Scanner; public class Home { /** * @param args */ 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("请输入天数"); int day=input.nextInt(); int sum=0; int days; for (; month-1 >0 ; month--) { if(month-1==1||month-1==3||month-1==5||month-1==7||month-1==8||month-1==10){ days=31; }else if(month-1==4||month-1==6|month-1==9||month-1==11){ days=30; }else if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0 && month-1 == 2) { System.out.println("该年为闰年"); days = 29; } else { days = 28; } sum=sum+days; } sum=sum+day; System.out.println("今天是"+year+"年的第"+sum+"天"); } } 复制代码
3.
package Home; import java.util.Scanner; public class Home { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入一个四位整数"); int num=input.nextInt(); int[ ] a=new int[4]; for (int i = 0; i < 4; i++) { a[i]=num%10; num=num/10; } System.out.println(a[0]*1000+a[1]*100+a[2]*10+a[3]); } }
