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 ); } } }