Java上机作业4.9

package aa;

public class mm {

	public static void main(String[] args) {
		int arr[]={10,20,30,40,50};
		for(int j=0;j<5;j++){
			System.out.println(arr[j]);

}
	}
}

　　

package aa;
import java.util.Scanner;
public class mm {

	public static void main(String[] args) {
		int arr[]=new int[5];
		for(int i=0;i<5;i++){
			Scanner input=new Scanner(System.in);
			arr[i]=input.nextInt();
			}
		
		for(int j=0;j<5;j++){
			System.out.println(arr[j]);

}
	}
}

　　

package aa;
import java.util.Scanner;
public class mm {

	public static void main(String[] args) {
		int arr[]={23,45,22,33,56};
	    double sum=0,pj;
		for(int i=0;i<5;i++){
			sum+=arr[i];
		}
			pj=sum/5;
			System.out.println("和是"+sum+"平均值是"+pj);

}
}

　　

package aa;
import java.util.Scanner;
public class mm {

	public static void main(String[] args) {
		int arr[]={18,25,7,36,13,2,89,63},max=arr[0],idx=0;
		for(int i=0;i<8;i++){
			if(arr[i]>max){
				max=arr[i];
				idx=i;
			}
		}
		System.out.println("最大值是"+max+"下标是"+idx);

}
}