第三次上机作业
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 number21; import java.util.Scanner; public class Zcc { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("输入变量x:"); Scanner input = new Scanner(System.in); int x=input.nextInt(); if(x!=1&&x!=5&&x!=10){ System.out.println("x=none"); }else if(x==1){ System.out.println("x=1"); }else if(x==5){ System.out.println("x=5"); }else if(x==10){ System.out.println("x=10"); } } }
2.用switch结构实现第1题
package number21; import java.util.Scanner; public class Zcc { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("输入变量x:"); Scanner input=new Scanner(System.in); int x=input.nextInt(); switch(x){ case 1: System.out.println("x=1"); break; case 5: System.out.println("x=5"); break; case 10:System.out.println("x=10"); break; default:System.out.println("x=none"); } } }
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 number21; import java.util.Scanner; public class Zcc { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.println("输入数字:"); int a=input.nextInt(); if(a%5==0&&a%6==0){ System.out.println("可以被5,6整除"); }else if(a%5==0&&a%6!=0){ System.out.println("能被5整除"); }else if(a%5!=0&&a%6==0){ System.out.println("能被6整除"); }else if(a%5!=0&&a%6!=0){ System.out.println("不能被5,6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 number2; import java.util.Scanner; public class zcc { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println(" 输入分数:"); Scanner input = new Scanner(System.in); int x=input.nextInt(); if(x<0||x>100){ System.out.println("无效"); }else if(x>=90){ System.out.println("A"); }else if(x>=80){ System.out.println("B"); }else if(x>=70){ System.out.println("C"); }else if(x>=60){ System.out.println("D"); }else if(x<60){ 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 number2; import java.util.Scanner; public class zcc { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("输入三个整数:"); Scanner input = new Scanner(System.in); int a=input.nextInt(); int b=input.nextInt(); int c=input.nextInt(); int d; if(a>b){ d=b; b=a; a=d; } if(a>c){ d=c; c=a; a=d; } if(b>c){ d=c; c=b; b=d; } System.out.println(a+" "+b+" "+c); } }