练习13（一位数组）

Posted 2020-10-15

一堆人
package cn.ch.w;

public class PersonArray {
     public static void main(String args[])
        {
            person per[]=new person[3];
            per[0]=new person("草菇",20);
            per[1]=new person("香菇",22);
            per[2]=new person("平菇",23);
            for (int x=0;x<per.length;x++)
            {
                per[x].getinfo();
            }
        }
}

package cn.ch.w;

public class person {
    private String name;
    private int age;
    public person(String name,int age)
    {
        this.name=name;
        this.age=age;
    }
    public void getinfo()
    {
        System.out.println("姓名: "+this.name+" 年龄: "+this.age);
    }


}

一位数组

package cn.ch.w;

public class A {
    public void getFibonacci(int number){
        int nLeft = 0;
        int nRight = 1;
        System.out.print(nRight);
        for (int i = 0; i < number; i++) {
        int sum = nLeft + nRight;
        System.out.print(" " + sum);
        nLeft = nRight;
        nRight = sum;
        }
        }
        public static void main(String[] args) {
        new A().getFibonacci(10);
        }

}

选择法

package cn.ch.w;

public class A {
    public static void main(String[] args) {
        int[] arr={23,234,3,1,19,21,231,88,90,11};
        for(int i=0;i<arr.length-1;i++) {
            for(int j=i+1;j<10;j++) {
                if(arr[i]>arr[j]) {
                    int temp;
                    temp=arr[i];
                    arr[i]=arr[j];
                    arr[j]=temp;
                }
            }
        }
         for(int i=0;i<arr.length;i++){
             System.out.println(arr[i]);
             
        } 

    }
}

冒泡

 

package cn.ch.w;

public class A {
    public static int main(String[] args) {
        int[] arr={23,234,3,1,19,21,231,88,90,11};
        for(int i=0;i<10;i++) {
            for(int j=0;j<10-1-i;j++) {
                if(arr[j]>arr[j+1]) {
                    int temp;
                    temp=arr[j];
                    arr[j]=arr[j+1];
                    arr[j+1]=temp;
                }

            }
        }
        for(int i=0;i<arr.length;i++){
             System.out.println(arr[i]);
        }
        return 0;

    }
}