Java第二次上机
- 编写程序, 输入变量x的值,如果是1,输出m=1,如果是5,输出m=5,如果是 10,输出m=10,除了以上几个值,都输出m=none。(知识点:if条件语句)
package test; import java.util.*; public class finish { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.println("请输入m的值:"); int m = input.nextInt(); if (m == 1) { System.out.println("m=1"); } else if(m == 5) { System.out.println("m=5"); } else if(m == 10) { System.out.println("m=10"); } else { System.out.println("m=none"); } } }
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用switch结构实现第1题
package test; import java.util.*; public class finish { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入一个数:"); 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("none"); break; } } }
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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 test; import java.util.*; public class finish { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入一个整数:"); int n=input.nextInt(); if(n%5==0&&n%6==0){ System.out.println(n+"能被5和6整除"); }else if(n%5==0){ System.out.println(n+"能被5整除"); }else if(n%6==0){ System.out.println(n+"能被6整除"); }else{ System.out.println("不能被5或者6整除"); } } }
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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 test; import java.util.*; public class finish { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入分数:"); int mark=input.nextInt(); if(mark<=100&&mark>=90){ System.out.println("A"); }else if(mark<=90&&mark>=80){ System.out.println("B"); }else if(mark<=80&&mark>=70){ System.out.println("C"); }else if(mark<=70&mark>=60){ System.out.println("D"); }else if(mark<=60){ System.out.println("E"); }else if(mark<0||mark>100){ System.out.println("分数无效"); } } }
- 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)
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package test; import java.util.*; public class finish { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.println("请输入x的值"); int x=input.nextInt(); System.out.println("请输入y的值"); int y=input.nextInt(); System.out.println("请输入z的值"); int z=input.nextInt(); if(x>y&&y>z){ System.out.println("输出"+z+","+y+","+x); }else if(x>z&&z>y) { System.out.println("输出"+y+","+z+","+x); }else if(y>x&&x>z) { System.out.println("输出"+z+","+x+","+y); }else if(y>z&&z>x) { System.out.println("输出"+x+","+z+","+y); }else if(z>y&&y>x) { System.out.println("输出"+x+","+y+","+z); }else if(z>x&&x>y) { System.out.println("输出"+y+","+x+","+z); } } }