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);
}
}

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