第七次作业

编写程序长度为5输出10 20 30 40 50

import java.util.Scanner;


public class fewfw {

    /**
     * @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<a.length;i++)
        System.out.println(a[i]);
    }

}

动态输出长度为5 输出5个值

import java.util.Scanner;


public class fewfw {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("输入五个数");

        int []a=new int[5];
        for(int i=0;i<a.length;i++){
            {a[i]=input.nextInt();}
        System.out.println(a[i]);
    }

}
}

输出字符 c h i n a（数组）

 

import java.util.Scanner;


public class wefw {

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

}

求同学的平均分和总分

import java.util.Scanner;


public class gfrd {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input =new Scanner (System.in);
        
        double avg=0;
        double sum=0;
        double[]a=new double[5];
        System.out.println("输入五个同学的成绩");    

for (int i = 0; i < a.length; i++){
    a[i]= input.nextDouble();
    sum +=a[i];
    avg =sum/5;
}
System.out.println(sum);
System.out.println(avg);
    }

}

数组12 53 23 44 53用 for foreach 倒叙

public class wang2 {

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

定义赋值求出奇数和偶数的个数

public class wang123 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        int[] a = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        int d = 0;
        int c = 0;
        for (int i = 0; i <a.length; i++) {
            if (a[i] % 2 == 0) {
                c++;
            }
            if (a[i] % 2 != 0) {
                d++;
            }
        }
        System.out.println(c);
        System.out.println(d);
    
    }

}

输出1到100的数字用数组

public class wang123 {

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

}

10个人的成绩double 加5分但不能超过100分

import java.util.Scanner;
public class wang123 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        double a[]=new double [10];
        Scanner input=new Scanner(System.in);
        for(int i=0;i<10;i++){
            a[i]=input.nextInt();
            if(a[i]<95)
                a[i]+=5;
            if(a[i]>=95)
                a[i]=100;
        }
        for (int i = 0; i < a.length; i++) {
            System.out.println("加五分为"+a[i]);
        
        }
         
    }

}