第七次作业

课上练习：

1.

package efstgvb;
import java.util.*;
public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
    
   int []a;
   a=new int[]{10,20,30,40,50};
   for(int i=0;i<a.length;i++){
       System.out.println(a[i]);
   }
   
    }

}

 

 2.

package efstgvb;
import java.util.Scanner;

public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
    
   int []a=new int[5];
 a[0]=10;
 a[1]=15;
 a[2]=20;
 a[3]=25;
 a[4]=30;
 for(int i=0;i<5;i++)
 {System.out.println(a[i]);}
  
    }

}

 

 3.

package efstgvb;
import java.util.Scanner;

public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
    
   char a[]={'c','h','i','n','a'};
  for(int i=0;i<a.length;i++)
 {System.out.println(a[i]);}
  
    }

}

 

 4.

 package efstgvb;
import java.util.Scanner;

public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
   int a[]=new int[5];
   int sum=0;
   double average;
    System.out.println("请输入五名同学的成绩");
  for(int i=0;i<a.length;i++){
 a[i]=input.nextInt();
  }
  for(int i=0;i<a.length;i++){
      sum+=a[i];
  }
  average=sum/5;
  System.out.println("总分为"+sum+"\t"+"平均分为"+average);
    }

}

 

 5.

 package efstgvb;


public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
   int a[]={12,53,23,44,53};
  for(int i=0;i<a.length;i++){
System.out.println(a[i]);
  }
  for(int i:a){
      System.out.println(i);
  }
  System.out.println("倒序输出");
  for (int i=a.length-1;i>=0;i--){
    System.out.println(a[i]);
    }
  }

}

 

 作业：

1.

package efstgvb;
import java.util.Scanner;

public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        int []a={35,48,42,56,99};
        for (int i = 0; i < a.length; i++) {
        System.out.println(a[i]);
        }
        int x=0,z=0;
        for(int i=0;i<=4;i++){
        if(a[i]%2==1)x=x+1;
        if(a[i]%2==0)z=z+1;
    }
        System.out.println(x);
        System.out.println(z);
    }

  }

 

 2.

package efstgvb;
import java.util.Scanner;

public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        int []a=new int[100];
        for (int i = 0; i < a.length; i++) {
            a[i]=i+1;
        }
        for (int i = 0; i < a.length; i++) {
            System.out.println(a[i]);
        }
        }
    }

 

 3.

 package efstgvb;
import java.util.Scanner;

public class lj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
       double []a=new double[10];
        
        for (int i = 0; i < a.length; i++) {
            a[i]=input.nextInt();
        }
        for (int i = 0; i < a.length; i++) {
            a[i]=a[i]+5;
            if(a[i]>=100)a[i]=100;
        }
        for (int i = 0; i < a.length; i++) {
            System.out.println(a[i]);
        }
        }
    }