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  • 第二次上机练习

    /*1.编写程序, 输入变量x的值,如果是1,输出x=1,如果是5,输出x=5,如果是 10,输出 x=10,除了以上几个值,
    都输出x=none。(知识点:if条件语句)*/
    package practice2;
    
    import java.util.Scanner;
    
    public class Code {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Scanner input = new Scanner(System.in);	
            System.out.print("input x=");
            int x = input.nextInt();
            if( x == 1 || x == 5 || x== 10){
            	System.out.println("output x=" + x);        
            }
            if( x != 1 && x != 5 && x != 10){
            	System.out.println("output x=none" );
            }
            
    	}
    
    }
    

      

    /*2.编写程序, 输入变量x的值,如果是1,输出x=1,如果是5,输出x=5,如果是 10,输出 x=10,除了以上几个值,
    都输出x=none。(知识点:switch条件语句)*/
    package practice2;
    
    import java.util.Scanner;
    
    public class Code2 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Scanner input = new Scanner(System.in);	
            System.out.print("input x=");
            int x = input.nextInt();
            switch( x ){
            case 1:
            case 5:
            case 10:
            	System.out.println("output x=" + x);
            	break;
            default:
            	System.out.println("output x=none");
            	break;
            }
    	}
    
    }
    

      

      

    /*3.判断一个数字是否能被5和6同时整除(打印能被5和6整除),或只能被5整除(打印能被5整 除),或只能被6整除,
    (打印能被6整除),不能被5或6整除,(打印不能被5或6整除)*/
    package practice2;
    
    import java.util.Scanner;
    
    public class Code3 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Scanner input = new Scanner(System.in);	
            System.out.print("请输入一个数:");
            int a = input.nextInt();
            if ( a % 5 == 0 && a % 6 == 0 ){
            	System.out.println(a + "能被5和6整除");
            } else if ( a % 5 == 0 ){
            	System.out.println(a + "能被5整除");
            } else if ( a % 6 == 0 ){
            	System.out.println(a + "能被和6整除");
            } else if ( a % 5 != 0 && a % 6 != 0 ){
            	System.out.println(a + "不能被5和6整除");
            }
    	}
    
    }
    

      

    /*4.输入一个0~100的分数,如果不是0~100之间,打印分数无效,根据分数等级打印 A(90-100),B(80-89),C,D,
    E(知识点:条件语句if elseif)*/
    package practice2;
    
    import java.util.Scanner;
    
    public class Code4 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Scanner input = new Scanner(System.in);	
            System.out.print("请输入一个0~100的个数:");
            int a = input.nextInt();
            if ( a >= 90 && a <= 100 ){
            	System.out.println("A");
            } else if ( a >= 80 && a <= 89 ){
            	System.out.println("B");
            } else if ( a >= 70 && a <= 79 ){
            	System.out.println("C");
            } else if ( a >= 60 && a <= 69 ){
            	System.out.println("D");
            } else if ( a >= 0 && a <= 59 ){
            	System.out.println("E");
            }
    	}
    
    }
    

      

      

    /*5.输入三个整数x,y,z,请把这三个数由小到大输出(知识点:条件语句)*/
    package practice2;
    
    import java.util.Scanner;
    
    public class Code5 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Scanner input = new Scanner(System.in);	
            System.out.print("请输入第一个数:");
            int x = input.nextInt();
            System.out.print("请输入第二个数:");
            int y = input.nextInt();
            System.out.print("请输入第三个数:");
            int z = input.nextInt();
            if ( x - y > 0 && z - x > 0 ){
            	System.out.println( y + "<" + x + "<" + z );
            } else if ( y - x > 0 && z - y > 0 ){
            	System.out.println( x + "<" + y + "<" + z );
            } else if ( y - z > 0 && x - y > 0 ){
            	System.out.println( z + "<" + y + "<" + x );
            } else if ( z - y > 0 && x - z > 0 ){
            	System.out.println( y + "<" + z + "<" + x );
            } else if ( z - x > 0 && y - z > 0 ){
            	System.out.println( x + "<" + z + "<" + y );
            } else if ( x - z > 0 && y - x > 0 ){
            	System.out.println( z + "<" + x + "<" + y );
            } else if ( x - z > 0 && y - x == 0 ){
            	System.out.println( z + "<" + x + "=" + y );
            } else if ( z - x > 0 && y - z == 0 ){
            	System.out.println( x + "<" + z + "=" + y );
            } else if ( z - y > 0 && x - z == 0 ){
            	System.out.println( y + "<" + z + "=" + x );
            } else if ( y - z == 0 && x - y == 0 ){
            	System.out.println( z + "=" + y + "=" + x );
            }
    	}
    
    }
    

      

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  • 原文地址:https://www.cnblogs.com/wu-di-821-821/p/12573539.html
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