java第四周作业

1. 分别使用for循环,while循环,do循环求1到100之间所有能被3整除的整数的和。(知识点:循环语句)

package doom3;

public class thefourweekworks1_0 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int i = 1;
		int sum = 0;
		for (i = 1; i <= 100; i++) {
			if (i % 3 == 0)
				sum += i;

		}
		System.out.print(sum);

	}

}

  

package doom3;

public class thefourweekworks1_1 {
	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.print(sum);
	}

}

  

package doom3;

public class thefourweekworks1_2 {
	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.print(sum);
	}

}

 

2. 输出0-9之间的数,但是不包括5。(知识点:条件、循环语句)

package doom3;

public class thefourweekworks2 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int i=0;
		for(i=0;i<10;i++){
			if(i==5)
			continue;
			System.out.print(" "+i+" ");
		}

	}

}

  

3. 编写一个程序,求整数n的阶乘,例如5的阶乘是1*2*3*4*5(知识点:循环语句)

package doom3;

import java.util.Scanner;

public class thefourweekworks3 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);

		System.out.print("请输入一个数字:");

		int n = input.nextInt();
		int i = 1;
		int sum = 1;
		for (i = 1; i <= n; i++) {
			sum *= i;
		}
		System.out.println(sum);

	}

}

  

4. 编写一个程序,输入任意学生成绩,如果输入不合法(<0或者>100),提示输入错误,重新输入,直到输入合法程序结束(知识点:循环语句)

package doom3;

import java.util.Scanner;

public class thefourweekworks4 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);
		System.out.print("请输入一名学生的成绩:");
		int i = input.nextInt();
		while (i < 0 || i > 100) {
			System.out.print("你输入的成绩有问题,请重新输入:");
			i = input.nextInt();
		}
		System.out.print("你输入的同学成绩为:" + i);
	}
}

  

5. 假设某员工今年的年薪是30000元,年薪的年增长率6%。编写一个Java应用程序计算该员工10年后的年薪,并统计未来10年(从今年算起)总收入。(知识点:循环语句)

package doom3;

public class thefourweekworks5 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int i = 0;
		double n = 30000;
		double count = n;
		for (i = 0; i <= 9; i++) {
			n = n * 1.06;
			count = count + n;
		}
		System.out.println("该员工10年后的年薪:" + n);
		System.out.println("该员工10年内的总收入:" + count);

	}

}

  

posted @ 2020-03-30 15:44  蒋俊宇  阅读(114)  评论(0编辑  收藏  举报