实训作业1

package 编程题;

import java.util.Scanner;

public class Exam3 {

    public Exam3() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.print("请输入一个数:");
        Scanner qw = new Scanner(System.in);
        int a = qw.nextInt();
        int i,j;
        for(i=2;i<a;i++) {
            j=a%i;
            if(j==0) {
                System.out.print("不是素数");
                break;
            }else
            {
                System.out.print("是素数");
                break;
            }
        }
    }

}









package 编程题;

public class Exam2 {
    public static void main(String [] are){
        int i,j,k,a;
        for(i=1;i<=4;i++){
            for(j=1;j<=4 && j!=i;j++){
                for(k=1;k<=4 && k!=i && k!=j;k++){
                    a=100*i+10*j+k;
                    System.out.print(a+" ");

            }
        }
    }

}
}












package 编程题;

import java.util.Scanner;

public class Exam1 {
    public static void main(String [] are) {
        System.out.print("请输入一个整数：");
        @SuppressWarnings("resource")
        Scanner input = new Scanner(System.in);
        int a = input.nextInt();
        int b = (int) ((a*10+5)/2+3.14159);
        System.out.println("加密结果为："+b);
    }
}


 




package 编程题;

import java.util.Scanner;

public class ja {

    public ja() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.print("请输入半径：");
        Scanner sd = new Scanner(System.in);
        int r = sd.nextInt();
        double area = r*r*3.14;
        System.out.println("圆面积为："+area);

    }

}



 
 
 
 

package 编程题;

public class qw {

    public qw() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int x,y,z;
        for(x=1;x<20;x++) {
            for(y=1;y<33;y++) {
                for(z=1;z<300;z++) {
                    if(100-(5*x+3*y+z/3)==0&&(x+y+z)==100)
                        System.out.println("公鸡"+x+"母鸡"+y+"小鸡"+z);
                }
                    
            }
            
        }
    }

}


 
 
 
 

package 编程题;

import java.util.Scanner;

public class Exam4 {

    public Exam4() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.print("请输入一个数:");
        Scanner qw = new Scanner(System.in);
        int a = qw.nextInt();
        if(a%2==0) {
            System.out.println("是偶数");
        }else
            System.out.println("是奇数");
    }

}