JAVA第七周上机作业

1.有10个评委打分,(去掉一个最高一个最低)求平均分。

package a;
import java.util.*;
public class ling {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
double[] arry = new double[10];
System.out.println("请输入10个评委的打分");
for (int i = 0; i < 10; i++) {
arry[i] = s.nextDouble();//分数
}
//对数组进行有大到小排序
double temp = 0;
for (int i = 0; i < arry.length; i++) {
for (int j = 0; j < arry.length-i-1; j++) {
if (arry[j]<arry[j+1]) {
temp = arry[j];
arry[j] = arry[j+1];
arry [j+1] = temp;
}
}
}
//遍历新数组
// for (int i = 0; i < 10; i++) {
// System.out.print(arry[i]);
// }
//让最大值最小值为0
arry[0]=0;
arry[9]=0;
double sum=0,pjs;
for (int i = 0; i < arry.length; i++) {
sum+=arry[i];
}
pjs=sum/8;
System.out.println("他的平均分是"+pjs);

}
}

2.自学一下Java随机数，生成一个长度为10的随机数组（每个数的范围是0~99），排序后输出。
package a;
import java.util.*;
public class ling {
public static void main(String[] args) {
// TODO Auto-generated method stub;
Random r = new Random();
int[] a = new int[10];
System.out.println("随机生成数组为：");
for (int j = 0; j < a.length; j++) {
a[j] = r.nextInt(100);
System.out.print(a[j] + " ");
}
System.out.println();
int t = 0;
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a.length - i - 1; j++) {
if (a[j] > a[j + 1]) {
t = a[j];
a[j] = a[j + 1];
a[j + 1] = t;
}
}
}
System.out.println("数组排序后为：");
for (int j = 0; j < 10; j++) {
System.out.print(a[j] + " ")
}
}
}

3.制作彩票35选7程序。 （就是1~35随机生成7个不重复的数）
package a;
import java.util.*;
public class ling {
public static void main(String[] args) {
// TODO Auto-generated method stub;
Random r = new Random();
int[] a = new int[7];
System.out.println("随机生成号码为：");
int t = 0;
fuck: for (int i = 0; i < a.length; i++) {
a[i] = r.nextInt(35) + 1;
t = a[i];
for (int j = 0; j < i; j++) {
if (a[j] == t) {
i--;
continue fuck;
}
}
}
for (int i = 0; i < a.length; i++) {
System.out.print(a[i] + " ");
}
}
}

4.定义一个长度为10的int数组,统计数组中的最大值、最小值、以及奇数和偶数的个数
package a;
import java.util.*;
public class ling {
public static void main(String[] args) {
// TODO Auto-generated method stub;
Random r = new Random();
int[] a = new int[10];
System.out.println("随机生成数组为：");
for (int j = 0; j < a.length; j++) {
a[j] = r.nextInt(100);
System.out.print(a[j] + " ");
}
System.out.println();
int max = 0, min = 0, ji = 0, ou = 0;
for (int i = 1; i < a.length; i++) {
if (a[i] > max) {
max = a[i];
}
}
for (int i = 1; i < a.length; i++) {
if (a[i] < min) {
min = a[i];
}
}
for (int i = 0; i < a.length; i++) {
if (a[i] % 2 == 0) {
ou += 1;
} else {
ji += 1;
}
}
System.out.println("最大值为" + max);
System.out.println("最小值为" + min);
System.out.println("偶数有" + ou + "个");
System.out.println("奇数有" + ji + "个");
}
}