Java第七次作业
1.
public class pll {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int[] a={10,20,30,40,50};
for(int i=0;i<5;i++){
System.out.println(a[i]);
}
}
}
2.
public class ppp {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int[]a=new int[5];
a[0]=10;
System.out.println(a[0]);
for(int i=1;i<5;i++){
a[i]+=a[i-1]+10;
System.out.println(a[i]);
}
}
}
3.
public class ppp {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
char[]a={'c','h','i','n','a'};
for (int x=0;x<=4;x++){
System.out.println(a[x]);
}
}
}
4.
import java.util.Scanner;
public class ppp {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入五个学生的成绩");
int[]a=new int[5];
int sum=0;
double average=sum/5;
for (int i=0;i<a.length;i++){
a[i]=input.nextInt();
sum+=a[i];
average=sum*1.0/5;
}
System.out.println("总分是"+sum);
System.out.println("平均分是"+average);
}
}
6
5.
public class ppp {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int[]a={12,53,23,44,53};
System.out.println("for输出是");
for (int i=0;i<a.length;i++){
System.out.println(a[i]);
}
System.out.println("foreach输出是");
for (int i:a){
System.out.println(i);
}
System.out.println("逆序输出是");
for (int i=4;i>=0;i--){
System.out.println(a[i]);
}
}
}
作业
1、定义一个整型数组，赋值(动态静态都可以)后求出奇数个数和偶数个数
package lh;
public class Jtzy1 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int []a={21,56,45,28,55};
int ji=0;
int ou=0;
for (int i = 0; i < 5; i++) {
if (a[i]%2==0) {
ou+=1;
}
if (a[i]%2!=0) {
ji+=1;
}
}
System.out.println("数组中奇数的个数"+ji+"\n"+"数组中偶数的个数"+ou);
}
}
2.生成一个100长度数组，里面的数分别是1-100，并输出
package lh;
public class Jtzy2 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int []a=new int[100];
for (int i = 0; i <100; i++) {
a[i]=i+1;
System.out.println(a[i]);
}
}
}
3.定义一个double数组，存放10个学生的成绩，给所有同学加5分，不能超过100分。
package lh;
public class Jtzy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
double []a={88,78,56,98,32,63,65,95,92,97};
for (int i = 0; i <10; i++) {
a[i]=a[i]+5;
if (a[i]>100) {
a[i]=a[i]-5;
}
System.out.println(a[i]);
}
}
}
