发布时间 : 星期日 文章java经典编程题二及详细答案更新完毕开始阅读
System.out.println(\该成绩为优\ } else if (grade >= 80 && grade < 90) { System.out.println(\该成绩为良\ } else if (grade >= 70 && grade < 80) { System.out.println(\该成绩为中\ } else if (grade >= 60 && grade < 70) { System.out.println(\该成绩及格\ } else {
System.out.println(\该成绩不及格\ } }
}结果截图：
? 提高题
1） 程序如下：
import java.util.Scanner; public class fangcheng {
public static void main(String[] args) {
Scanner input = new Scanner(System.in); System.out.println(\请输入a\ double a=input.nextDouble(); System.out.println(\请输入b\ double b=input.nextDouble(); System.out.println(\请输入c\ double c=input.nextDouble(); if(a==0)
{ System.out.println(\对不起该方程不是一元二次方程\ else if(b*b-4*a*c==0)
{System.out.println((-b Math.sqrt(b*b-4*a*c))/(2*a)); } else if (b*b-4*a*c>0) {
System.out.println(\第一个答案为\ System.out.println(\第二个答案为\ } else
{System.out.println(\对不起没有答案\ } }
截图如下：
2） 程序如下：
import java.util.Scanner; public class Tax {
public static void main(String[] args) { double s;
Scanner input = new Scanner(System.in); System.out.println(\请输入所得税额t\ double t=input.nextDouble();; if(t==500)
{System.out.println(\应纳个人所得税税额为:25\ else if(t<=2000) { s=0.1*t-25;
System.out.println(\应纳个人所得税税额为:\ else if (t<=5000) { s=0.15*t-125;
System.out.println(\应纳个人所得税税额为:\
else if (t<=20000) { s=0.2*t-375;
System.out.println(\应纳个人所得税税额为:\ else if (t<=40000) { s=0.25*t-1375;
System.out.println(\应纳个人所得税税额为:\ else if (t<=60000) { s=0.3*t-3375;
System.out.println(\应纳个人所得税税额为:\ else if (t<=80000) { s=0.35*t-6375;
System.out.println(\应纳个人所得税税额为:\ else if (t<=100000) { s=0.4*t-10375;
System.out.println(\应纳个人所得税税额为:\ else
{ s=0.45*t-15375;
System.out.println(\应纳个人所得税税额为:\ } }
结果截图：
实验2.3
? 基本题
1）程序如下： import java.io.*; public class Sanjiao {
public static void main(String[] args) {
int n=0; try {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.println(\请输入一个整数:\ String r = in.readLine(); n = Integer.parseInt(r); }
catch(Exception E){}
System.out.print(\相应三角形如下:\ for(int i=0;i<=n;i ) {
for(int j=0;j 结果截图： 2）程序如下： public class sum { public static void main(String[] args) { float sum = 0F; for(int i = 1; i <=100; i ){ if(i % 2 == 0){ sum -= (float)1 / i;