四则运算 web版 团队开发
主要思路：
建立三个Jsp：
1、分别主界面登录界面是控制出题的参数；
2、出题及输入题目答案
3、处理输入的答案。
将算法封装打包到一个类包中包括：
1、方法连接数据库
2、处理数据库中表的数据
3、计算有无括号的整数运算
4、计算求余运算的整数运算
5、给式子加括号，求最大公约数
6、计算有无括号的真分数运算。
其中，在实现出题的jsp文件中利用request函数进行数据获取，在利用if语句来进行判断出题的格式；
·代码如下：
NewFile.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>出题系统</title>
</head>
<body >
<h2>出题系统</h2>
<form action="check.jsp" method="post">
出题数量：<input type="text" name = "username"><br>
题目样式：请输入几元运算<br>
输入： <input type="text" name="choose1"><br>
题目样式：请输入范围<br>
输入：<input type="text" name="choose2"><br><hr>
题目样式：1.整数四则运算 2.真分数四则运算<br>
选择： 有<input type="radio" name="choose"value=1> 无<input type="radio" name="choose"value=2><br>
题目样式：1.有乘除 2.无乘除<br>
选择： 有<input type="radio" name="choose3"value=1> 无<input type="radio" name="choose3"value=2><br>
题目样式：1.有负数 2.无负数<br>
选择： 有<input type="radio" name="choose4"value=1> 无<input type="radio" name="choose4"value=2><br>
题目样式：1.有余数 2.无余数<br>
选择： 有<input type="radio" name="choose6"value=1> 无<input type="radio" name="choose6"value=2><br>
题目样式：1.有括号 2.无括号<br>
选择： 有<input type="radio" name="choose7"value=1> 无<input type="radio" name="choose7"value=2><br>
题目样式：1.显示答案 2.不显示答案<br>
选择： 有<input type="radio" name="choose5"value=1> 无<input type="radio" name="choose5"value=2><br>
<input type="submit" value="出题">
</form>
</body>
</html>
check.jsp
<%@ page language="java" import="java.sql.*" import="java.util.*" contentType="text/html;; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import= "tianaoweb.com.* "%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>试卷</title>
</head>
<%!
public static String ztimu(int num1,int num2,int num3)
{//num1是几元运算，num2是范围，num3是有无乘除法
int intVal1 = 0;
int ys = 0;
String ss = "";
for(int i=1;i<=num1;i++)
{
intVal1 = (int)(Math.random()*num2+1);
if(i < num1)
{
if(num3 == 2)
ys = (int)(Math.random()*num3+1);
else
ys = (int)(Math.random()*(num3+3)+1);
}
else
ys = 0;
ss = ss + intVal1;
if(ys==0)
{
ss = ss+"";
}
if(ys==1){
ss = ss +"+";
}
if(ys==2){
ss = ss +"-";
}
if(ys==3){
ss = ss +"*";
}
if(ys==4){
ss = ss +"÷";
}
}
return ss;
}
%>
<%!
public static String ftimu(int num1,int num2,int num3)
{//num1是几元运算，num2是范围，num3是有无乘除
int intVal1 = 0;
int intVal2 = 0;
int ys = 0;
String ss = "";
for(int i=1;i<=num1;i++)
{
intVal1 = 0;
intVal2 = 0;
while(intVal1 == intVal2)
{
intVal1 = (int)(Math.random()*num2+1);
intVal2 = (int)(Math.random()*num2+1);
if(intVal1<intVal2)
{
ss = ss + intVal1+"/"+intVal2;
}
if(intVal1>intVal2)
{
ss = ss + intVal2+"/"+intVal1;
}
}
if(i < num1)
{
if(num3 == 2)
ys = (int)(Math.random()*num3+1);
else
ys = (int)(Math.random()*(num3+3)+1);
}
else
{
ys = 0;
}
if(ys==0)
{
ss = ss+"";
}
if(ys==1){
ss = ss +"+";
}
if(ys==2){
ss = ss +"-";
}
if(ys==3){
ss = ss +"*";
}
if(ys==4){
ss = ss +"÷";
}
}
return ss;
}
%>
<%!
public static String fcal(String ss ,int n,int m)
{
fencal fen = new fencal();
String sz = fencal.shizi(ss, n, m);
String fmm = fencal.fenmu(ss, n, m);
double fm = Double.parseDouble(fmm);
StringCaculate sc = new StringCaculate();
double fz = sc.fun2(sz);
int fz1=(int)fz;
int fm1=(int)fm;
int gy = fen.getGongYueShu(fz1,fm1);
String result = (fz1/gy) +"/"+(fm1/gy);
return result;
}
%>
<body>
<form action="ans.jsp" method="post">
<%
JspWriter mout=pageContext.getOut();
Action ac = new Action();
String us = request.getParameter("username");//出题数量
String ch = request.getParameter("choose");//整数四则运算还是真分数
String ch1 = request.getParameter("choose1");//几元运算
String ch2 = request.getParameter("choose2");//范围
String ch3 = request.getParameter("choose3");//有无乘除
String ch4 = request.getParameter("choose4");//有无负数
String ch5 = request.getParameter("choose5");//显示答案
String ch6 = request.getParameter("choose6");//有无余数
String ch7 = request.getParameter("choose7");//有无括号
int num = Integer.parseInt(us);
int cho = Integer.parseInt(ch);
int cho1 = Integer.parseInt(ch1);
int cho2 = Integer.parseInt(ch2);
int cho3 = Integer.parseInt(ch3);
int cho4 = Integer.parseInt(ch4);
int cho5 = Integer.parseInt(ch5);
int cho6 = Integer.parseInt(ch6);
int cho7 = Integer.parseInt(ch7);
if(cho == 1)//整数题
{
mout.print(num+"道整数题目");
mout.print("<br>");
String[] str = new String[num+1];//题目
double[] st = new double[num+1];//答案
double[] s = new double[num+1];//余数
str[0]="";
String ss = "";
if(cho4 == 1)//有负数
{
if(cho6 == 2)//无余数
for(int i=1;i<=num;i++)
{
int state = 0;
while(state == 0)
{
ss = ztimu(cho1,cho2,cho3);
if(cho7 == 1)//有括号
{
Kuohao k = new Kuohao();
ss =k.kh(ss,cho1);
}
StringCaculate re = new StringCaculate();
double result = re.fun2(ss);
double r = result-(int)result;
for(int j=0;j<i;j++)
{
if(ss.equals(str[j])||r!=0.0)
{
state = 0;
}
else
{
str[i] = ss;
st[i] = result;
state = 1;
}
}
}
mout.print(i+" 、 ");
mout.print(str[i]);
mout.print("= ?");
mout.print("<br>");
session.setAttribute("flag",i);
%>
计算结果 ：<input type="text" name="content<%=i %>" id="input">
<%
mout.print("<br>");
}
if(cho6 == 1)//有余数
for(int i=1;i<=num;i++)
{
int state = 0;
while(state == 0)
{
ss = ztimu(cho1,cho2,cho3);
if(cho7 == 1)//有括号
{
Kuohao k = new Kuohao();
ss =k.kh(ss,cho1);
}
StringCaculate re = new StringCaculate();
double result = re.fun2(ss);
double r = result-(int)result;
for(int j=0;j<i;j++)
{
if(cho1>2)//三元以上无余数
{
if(ss.equals(str[j]))
{
state = 0;
}
else
{
str[i] = ss;
st[i] = result;
state = 1;
}
}
if(cho1<=2)
{
if(ss.equals(str[j]))
{
state = 0;
}
else
{
str[i] = ss;
st[i] = (int)result;
state = 1;
if(r==0)
s[i]=0;
else
{
Caculate ree = new Caculate();
s[i] = ree.fun1(ss);
}
}
}
}
}
mout.print(i+" 、 ");
mout.print(str[i]);
mout.print("= ?");
mout.print("<br>");
}
}
if(cho4 == 2)//无负数
{
if(cho6 == 2)//无余数
for(int i=1;i<=num;i++)
{
int state = 0;
while(state == 0)
{
ss = ztimu(cho1,cho2,cho3);
if(cho7 == 1)//有括号
{
Kuohao k = new Kuohao();
ss =k.kh(ss,cho1);
}
StringCaculate re = new StringCaculate();
double result = re.fun2(ss);
double r = result-(int)result;
for(int j=0;j<i;j++)
{
if(ss.equals(str[j])||r!=0.0||result<0)
{
state = 0;
}
else
{
str[i] = ss;
st[i] = result;
state = 1;
}
}
}
mout.print(i+" 、 ");
mout.print(str[i]);
mout.print("= ?");
mout.print("<br>");
%>
计算结果 ：<input type="text" name="content<%=i %>" id="input">
<%
mout.print("<br>");
}
if(cho6 == 1)//有余数
for(int i=1;i<=num;i++)
{
int state = 0;
while(state == 0)
{
ss = ztimu(cho1,cho2,cho3);
if(cho7 == 1)//有括号
{
Kuohao k = new Kuohao();
ss =k.kh(ss,cho1);
}
StringCaculate re = new StringCaculate();
double result = re.fun2(ss);
double r = result-(int)result;
for(int j=0;j<i;j++)
{
if(cho1>2)//三元以上无余数
{
if(ss.equals(str[j])||result<0)
{
state = 0;
}
else
{
str[i] = ss;
st[i] = result;
state = 1;
}
}
if(cho1<=2)
{
if(ss.equals(str[j])||result<0)
{
state = 0;
}
else
{
str[i] = ss;
st[i] = (int)result;
state = 1;
if(r==0)
s[i]=0;
else
{
Caculate ree = new Caculate();
s[i] = ree.fun1(ss);
}
}
}
}
}
mout.print(i+" 、 ");
mout.print(str[i]);
mout.print("= ?");
mout.print("<br>");
}
}
String[] newst = new String[num+1];
for(int i=1;i<=num;i++)
newst[i] = (int)st[i]+"";
for(int number = 1;number<=num;number++)
ac.add(number,str[number],newst[number]);
%><input type="submit" value="提交"> <%
session.setAttribute("str",newst);
session.setAttribute("st",str);
if(cho5 == 1)
{
mout.print("<br>");
mout.print("参考答案");
mout.print("<br>");
for(int m=1;m<=num;m++)
{
mout.print(m+" 、 "+st[m]);
if(s[m] != 0)
mout.print("······"+s[m]);
mout.print("<br>");
}
}
}
if(cho == 2)//真分数
{
mout.print(num+"道真分数题目");
mout.print("<br>");
String[] st = new String[num+1];
String[] st1 = new String[num+1];
st[0]="";
String ss = "";
for(int i=1;i<=num;i++)
{
int state = 0;
while(state == 0)
{
ss = ftimu(cho1,cho2,cho3);
for(int j=0;j<i;j++)
{
if(ss.equals(st[j]))
{
state = 0;
}
else
{
st[i] = ss;
String ans = fcal(ss,cho1,cho7);
st1[i] = ans;
state = 1;
}
}
}
mout.print(i+" 、 ");
mout.print(st[i]);
mout.print("= ?");
mout.print("<br>");
session.setAttribute("flag",i);
%>
<%-- 题号 ：<input type="text" name="num+<%=i %>" id="input"> --%>
计算结果 ：<input type="text" name="content<%=i %>" id="input">
<%
mout.print("<br>");
}
for(int number = 1;number<=num;number++)
ac.add(number,st[number],st1[number]);
%><input type="submit" value="提交"> <%
session.setAttribute("str",st1);
session.setAttribute("st",st);
if(cho5 == 1)
{
mout.print("<br>");
mout.print("参考答案");
mout.print("<br>");
for(int m=1;m<=num;m++)
{
mout.print(m+" 、 "+st1[m]);
mout.print("<br>");
}
}
}
%>
</body>
</html>
ans.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ page import= "tianaoweb.com.* "%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>ans.jsp</title>
</head>
<body>
<%
JspWriter mout=pageContext.getOut();
int date = (int)request.getSession().getAttribute("flag");
String[] an = new String[date+1];
for(int i=1;i<=date;i++)
{
String answer = request.getParameter("content"+i);
an[i] = answer;
System.out.println(date);
//Action ac = new Action();
//ac.addans(i, answer);
}
String[] str=(String[])session.getAttribute("str");//答案
String[] st=(String[])session.getAttribute("st");
for(int i=1;i<=date;i++)
{
System.out.println(str[i]);
}
int correct = 0;
int wrong = 0;
%><p>做错的题如下：</p><%
for(int i=1;i<=date;i++)
{
if(str[i].equals(an[i]))
{
correct++;
}
else
{
wrong++;
mout.print(wrong+" 、 "+st[i]+" = "+an[i]);
mout.print("正确答案为 "+str[i]);
mout.print("<br>");
}
}
%><p>本次测验结果如下：</p><%
mout.print("共错"+wrong+"道题");
mout.print("<br>");
mout.print("共对"+correct+"道题");
mout.print("<br>");
%>
</body>
</html>
Main.java
package tianaoweb.com;
import java.sql.*;
public class Main {
public static Connection getConn(){
String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
Connection dbConn = null;
String dbURL="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=哈哈";
String userName="sa";
String userPwd="123456";
try
{
Class.forName(driverName);
System.out.println("加载驱动成功！");
}catch(Exception e){
e.printStackTrace();
System.out.println("加载驱动失败！");
}
try{
dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
System.out.println("连接数据库成功！");
}catch(Exception e)
{
e.printStackTrace();
System.out.print("SQL Server连接失败！");
}
return dbConn;
}
}
Action.java
package tianaoweb.com;
import java.sql.*;
public class Action {
public void add(int num,String str1,String str2) throws SQLException{
Connection conn = Main.getConn(); //获取数据库连接
Statement st = conn.createStatement();
String sql = "insert into calTable([number],[question],[answer]) values('"+ num +"','" + str1 + "','" + str2 + "')";
st.executeUpdate(sql);
st.close();
conn.close();
}
/*public void addans(int num,String str1) throws SQLException{
System.out.println(num + " "+str1);
Connection conn = Main.getConn(); //获取数据库连接
Statement st = conn.createStatement();
String sql = "update calTable set own = '"+str1+"' where number = '"+num+"'";
st.executeUpdate(sql);
st.close();
conn.close();
}*/
}
Caculate.java
package tianaoweb.com;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
public class Caculate {
/*public static void main(String[] args) {
// TODO Auto-generated method stub
String str1="22+4*(2+3)";
double result=fun2(str1);
System.out.println(result);
}*/
public static Map pro=new HashMap();
public static void init()
{
pro.put('+', 1);
pro.put('-', 1);
pro.put('*', 2);
pro.put('÷', 2);
}
public static int getIndex(String str)
{
int index1=(str.indexOf('+')==-1?str.length():str.indexOf('+'));
int index2=(str.indexOf('-')==-1?str.length():str.indexOf('-'));
int index3=(str.indexOf('*')==-1?str.length():str.indexOf('*'));
int index4=(str.indexOf('÷')==-1?str.length():str.indexOf('÷'));
int index=index1<index2?index1:index2;
index=index<index3?index:index3;
index=index<index4?index:index4;
return index;
}
public static double cal(char op,double num1,double num2)
{
switch(op)
{
case '+':
return num1+num2;
case '-':
return num1-num2;
case '*':
return num1*num2;
default:
return num1%num2;
}
}
public static double fun1(String str)
{
init();
Stack st1=new Stack();
Stack st2=new Stack();
int fop=0;
while(str.length()>0)
{
int index=getIndex(str);
st1.push(Double.parseDouble(str.substring(0,index)));
if(index!=str.length())
{
char op=str.charAt(index);
str=str.substring(index+1);
while(true)
{
if((int)pro.get(op)>fop)
{
st2.push(op);
fop=(int)pro.get(op);
break;
}
else
{
double num2= (double) st1.pop();
double num1=(double) st1.pop();
double result=cal((char)st2.pop(),num1,num2);
st1.push(result);
if(st2.size()==0)
{
st2.push(op);
fop=(int)pro.get(op);
break;
}
char cop=(char) st2.pop();
fop=(int)pro.get(cop);
st2.push(cop);
}
}
}
else
{
break;
}
}
while(st2.size()!=0)
{
double num2=(double) st1.pop();
double num1=(double) st1.pop();
char op=(char) st2.pop();
st1.push(cal(op,num1,num2));
}
double result=(double) st1.pop();
return result;
}
public static double fun2(String str)
{
while(str.indexOf('(')!=-1)
{
int left=0;
int right=str.length();
char op;
for(int i=0;i<str.length();i++)
{
if(str.charAt(i)=='(')
{
left=i;
}
if(str.charAt(i)==')')
{
right=i;
break;
}
}
str=str.substring(0,left)+fun1(str.substring(left+1,right))+str.substring(right+1);
}
return fun1(str);
}
}
StringCaculate.java
package tianaoweb.com;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
public class StringCaculate {
public static Map pro=new HashMap();
public static void init()
{
pro.put('+', 1);
pro.put('-', 1);
pro.put('*', 2);
pro.put('÷', 2);
}
public static int getIndex(String str)
{
int index1=(str.indexOf('+')==-1?str.length():str.indexOf('+'));
int index2=(str.indexOf('-')==-1?str.length():str.indexOf('-'));
int index3=(str.indexOf('*')==-1?str.length():str.indexOf('*'));
int index4=(str.indexOf('÷')==-1?str.length():str.indexOf('÷'));
int index=index1<index2?index1:index2;
index=index<index3?index:index3;
index=index<index4?index:index4;
return index;
}
public static double cal(char op,double num1,double num2)
{
switch(op)
{
case '+':
return num1+num2;
case '-':
return num1-num2;
case '*':
return num1*num2;
default:
return num1/num2;
}
}
public static double fun1(String str){
if(str.charAt(0)=='-'){
return fun1("0"+str);
}
int q=-1,qq=-1;
for(int i=0;i<str.length();i++){
if(str.charAt(i)=='-'&&str.charAt(i+1)=='-'){
q=i;
}
if(str.charAt(i)=='+'&&str.charAt(i+1)=='-'){
qq=i;
}
}
if(q!=-1){
return fun1(str.substring(0,q)+"+"+str.substring(q+2,str.length()));
}
if(qq!=-1){
return fun1(str.substring(0,qq)+"-"+str.substring(qq+2,str.length()));
}
init();
Stack st1=new Stack();
Stack st2=new Stack();
int fop=0;
while(str.length()>0){
int index=getIndex(str);
st1.push(Double.parseDouble(str.substring(0,index)));
if(index!=str.length())
{
char op=str.charAt(index);
str=str.substring(index+1);
while(true){
if((int)pro.get(op)>fop)
{
st2.push(op);
fop=(int)pro.get(op);
break;
}
else
{
double num2= (double) st1.pop();
double num1=(double) st1.pop();
double result=cal((char)st2.pop(),num1,num2);
st1.push(result);
if(st2.size()==0)
{
st2.push(op);
fop=(int)pro.get(op);
break;
}
char cop=(char) st2.pop();
fop=(int)pro.get(cop);
st2.push(cop);
}
}
}
else
break;
}
while(st2.size()!=0)
{
double num2=(double) st1.pop();
double num1=(double) st1.pop();
char op=(char) st2.pop();
st1.push(cal(op,num1,num2));
}
double result=(double) st1.pop();
return result;
}
public static double fun2(String str){
while(str.indexOf('(')!=-1)
{
int left=0;
int right=str.length();
char op;
for(int i=0;i<str.length();i++)
{
if(str.charAt(i)=='(')
left=i;
if(str.charAt(i)==')')
{
right=i;
break;
}
}
double result=fun1(str.substring(left+1,right));
System.out.println(result);
str=str.substring(0,left)+result+str.substring(right+1);
System.out.println(str);
}
return fun1(str);
}
}
fencal.java
package tianaoweb.com;
public class fencal {
public static String fenmu(String ss,int n,int m)
{//n 几元，m 有无括号
ss = '='+ss+'=';
String result="";
String cal = "";
int num = n*2+1;
if(m == 1)
{
num = num + 2;
}
int length = ss.length();
int[] in = new int[num];//操作符下标数组
String[] str = new String[n];//分母数组
String[] str1 = new String[n];//分子数组
int i=0;//操作符计数器
int j=0;//字符串计数器
int z=0;//分母数组计数器
double fm=1;
for(j=0;j<length;j++)
{
if(ss.charAt(j)=='+'||ss.charAt(j)=='÷'||ss.charAt(j)=='-'||ss.charAt(j)=='*'||ss.charAt(j)=='('||ss.charAt(j)==')'||ss.charAt(j)=='/'||ss.charAt(j)=='=')
{
in[i] = j;
i++;
}
}
/*for(i=0;i<num;i++)
System.out.println(in[i]);*/
for(i=0;i<num;i++)
{
if(ss.charAt(in[i]) == '/')
{
str[z] = ss.substring(in[i]+1, in[i+1]);
z++;
}
}
/*for(z=0;z<n;z++)
System.out.println(str[z]);*/
for(z=0;z<n;z++)
{
double fmm = Double.parseDouble(str[z]);
fm = fm*fmm;
}
System.out.println("分母为"+fm);
return ""+fm;
}
public static String shizi(String ss,int n,int m)
{
String shizi = "";
ss = '='+ss+'=';
String result="";
String cal = "";
int num = n*2+1;
if(m == 1)
{
num = num + 2;
}
int length = ss.length();
int[] in = new int[num];//操作符下标数组
String[] str = new String[n];//分母数组
String[] str1 = new String[n];//分子数组
int i=0;//操作符计数器
int j=0;//字符串计数器
int z=0;//分母数组计数器
double fm=1;
for(j=0;j<length;j++)
{
if(ss.charAt(j)=='+'||ss.charAt(j)=='÷'||ss.charAt(j)=='-'||ss.charAt(j)=='*'||ss.charAt(j)=='('||ss.charAt(j)==')'||ss.charAt(j)=='/'||ss.charAt(j)=='=')
{
in[i] = j;
i++;
}
}
for(i=0;i<num;i++)
System.out.println(in[i]);
for(i=0;i<num;i++)
{
if(ss.charAt(in[i]) == '/')
{
str[z] = ss.substring(in[i]+1, in[i+1]);
z++;
}
}
/*for(z=0;z<n;z++)
System.out.println(str[z]);*/
for(z=0;z<n;z++)
{
double fmm = Double.parseDouble(str[z]);
fm = fm*fmm;
}
System.out.println("分母为"+fm);
z=0;
for(i=0;i<num;i++)
{
if(ss.charAt(in[i]) == '/')
{
str1[z] = ss.substring(in[i-1]+1, in[i]);
z++;
}
}
for(z=0;z<n;z++)
{
double fmm = Double.parseDouble(str[z]);
double fzz = Double.parseDouble(str1[z]);
double fz = fm/fmm*fzz;
str1[z] = ""+fz;
}
for(z=0;z<n;z++)
System.out.println("分子"+str1[z]);
z=0;
int numm = n-1;
if(m == 1)
numm = numm +2;
String[] str2 =new String[numm];
for(i=0;i<num;i++)
{
if(ss.charAt(in[i])!='='&&ss.charAt(in[i])!='/')
{
str2[z] = ""+ss.charAt(in[i]);
z++;
}
}
/*for(z=0;z<numm;z++)
System.out.println(str2[z]);*/
if(m == 1)
{
for(i=0;i<numm;i++)
{
if(str2[i].equals("(")&&i>0)
{
j=i-1;
str2[j] = str2[j] + str2[i];
break;
}
}
for(j=j+1;j<numm-1;j++)
str2[j]=str2[j+1];
}
if(m == 1)
{
for(i=0;i<numm;i++)
{
if(str2[i].equals(")")&&i<numm-1)
{System.out.println("zou");
j=i+1;
str2[i] = str2[i]+str2[j];
break;
}
}
for(;j<numm-1;j++)
str2[j]=str2[j+1];
}
for(z=0;z<numm;z++)
System.out.println(str2[z]);
if(str2[0].equals("("))
{
for(i=0;i<n-1;i++)
{
shizi = shizi + str2[i]+""+ str1[i];
}
shizi = shizi + str2[i]+str1[n-1];
}
else if(str2[numm-1].equals(")"))
{
for(i=0;i<n-1;i++)
{
shizi = shizi + str1[i]+ ""+ str2[i];
}
shizi = shizi +str1[n-1]+str2[i];
}
else
{
for(i=0;i<n-1;i++)
{
shizi = shizi + str1[i]+""+ str2[i];
}
shizi = shizi + str1[n-1];
}
return shizi;
}
public static int getGongYueShu(int a, int b){
int t = 0;
if(a<b){
t =a;
a=b;
b=t;
}
int c=a%b;
if(c==0)
{
return b;
}
else
return getGongYueShu(a,c);
}
}
结果截图：
（1）整数运算
（2）真分数运算
浙公网安备 33010602011771号