设计思路：
1.遍历每一个运算符，即在运算的题目答案的时候，使得不出现负数和假分数（若出现就调换数的位置或者改变运算符）
2.添加括号的方法就是列举所有加括号可能的情况，然后在相应的位置输出括号和进行计算
3.因为前面用的都是死方法，所以没有找到较好地方法检查重复
源代码：
<%@ 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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="2.jsp">
<center>
<table>
<tr>
<td>是否有乘除：
<select name="muldiv">
<option value=0>无乘除法</option>
<option value=1>有乘除法</option>
</td>
</tr>
<tr>
<td>是否有括号：
<select name="bra">
<option value=0>无括号</option>
<option value=1>有括号</option>
</td>
</tr>
<tr>
<td>取值范围（下限）：<input type="text" name="min"></td>
</tr>
<tr>
<td>取值范围（上限）：<input type="text" name="max"></td>
</tr>
<tr>
<td>题目数量：<input type="text" name="subject"></td>
</tr>
<tr>
<td><input type="submit" value="确定"></td>
</tr>
</table>
</center>
</form>
</body>
</html>
<%@ 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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="3.jsp">
<%
String user0=request.getParameter("muldiv"); //是否有乘除
int muldiv=Integer.valueOf(user0);
String user1=request.getParameter("bra"); //是否有括号
int bra=Integer.valueOf(user1);
String user2=request.getParameter("min"); //取值最小值
int min=Integer.valueOf(user2);
String user3=request.getParameter("max"); //取值最大值
int max=Integer.valueOf(user3);
String user4=request.getParameter("subject"); //题目数量
int subject=Integer.parseInt(user4);
int save;
int mol = 0;
int den = 0;
String correct[] = new String[subject];
String answer[] = new String[subject];
for(int x=0;x<subject;x++)
{
answer[x]="name"+x;
int number = (int)(Math.random()*3+2); //随机生成参与运算的数的个数
int num[] = new int[number]; //储存进行运算的数
String ope[] = new String[number]; //储存运算符
//两个数运算
if(number==2)
{
//随机生成进行运算的数
for(int i=0;i<number;i++)
{
num[i] = (int)(Math.random()*(max-min+1)+min);
}
//随机生成运算符
for(int i=0;i<number-1;i++)
{
int j = (int)(Math.random()*4);
//乘除法
if(muldiv==0)
{
if(j==2)
{
j = 0;
}
else if(j==3)
{
j = 1;
}
}
if(j==0)
{
ope[i] = "+";
}
else if(j==1)
{
ope[i] = "-";
}
else if(j==2)
{
ope[i] = "*";
}
else if(j==3)
{
ope[i] = "/";
}
}
ope[number-1] = "=";
//不产生负数
if(ope[0]=="-")
{
if(num[0]<num[1])
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
}
//保证真分数
else if(ope[0]=="/")
{
if(num[0]>num[1])
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
//储存答案
if(ope[0]=="+")
{
save = num[0] + num[1];
correct[x] = (save+"");
}
else if(ope[0]=="-")
{
save = num[0] - num[1];
correct[x] = (save+"");
}
else if(ope[0]=="*")
{
save = num[0] * num[1];
correct[x] = (save+"");
}
else if(ope[0]=="/")
{
//约分
for(int i=num[0];i>0;i--)
{
if(num[0]%i==0&&num[1]%i==0)
{
mol = num[0] / i;
den = num[1] / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
//三个数运算
else if(number==3)
{
//随机生成进行运算的数
for(int i=0;i<number;i++)
{
num[i] = (int)(Math.random()*(max-min+1)+min);
}
//随机生成运算符
for(int i=0;i<number-1;i++)
{
int j = (int)(Math.random()*4);
//乘除法
if(muldiv==0)
{
if(j==2)
{
j = 0;
}
else if(j==3)
{
j = 1;
}
}
if(j==0)
{
ope[i] = "+";
}
else if(j==1)
{
ope[i] = "-";
}
else if(j==2)
{
ope[i] = "*";
}
else if(j==3)
{
ope[i] = "/";
}
}
ope[number-1] = "=";
//加括号
if(bra==1)
{
int brackets = (int)(Math.random()*3);
//括前两个
if(brackets==0)
{
int check = 0;
//保证不产生负数和假分数
if(ope[0]=="+")
{
check = num[0] + num[1];
}
else if(ope[0]=="-")
{
if(num[0]<num[1])
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
check = num[0] - num[1];
}
else if(ope[0]=="*")
{
check = num[0] * num[1];
}
else if(ope[0]=="/")
{
if(num[0]>num[1])
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
check = num[0] / num[1];
}
if(ope[1]=="-")
{
if(check<num[2])
{
//输出算式
out.print(num[2]+ope[1]+"("+num[0]+ope[0]+num[1]+")"+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="/")
{
//约分
for(int i=num[0];i>0;i--)
{
if(num[0]%i==0&&num[1]%i==0)
{
mol = num[0] / i;
den = num[1] / i;
break;
}
}
mol = num[2] * den - mol;
correct[x] = (mol+"/"+den);
}
else
{
save = num[2] - check;
correct[x] = (save+"");
}
}
else
{
//输出算式
out.print("("+num[0]+ope[0]+num[1]+")"+ope[1]+num[2]+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="/")
{
//约分
for(int i=num[0];i>0;i--)
{
if(num[0]%i==0&&num[1]%i==0)
{
mol = num[0] / i;
den = num[1] / i;
break;
}
}
mol = mol - num[2] * den;
correct[x] = (mol+"/"+den);
}
else
{
save = check - num[2];
correct[x] = (save+"");
}
}
}
else if(ope[1]=="/")
{
if(check>=num[2])
{
//输出算式
out.print(num[2]+ope[1]+"("+num[0]+ope[0]+num[1]+")"+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="/")
{
mol = num[1] * num[2];
den = num[0];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
mol = num[2];
den = check;
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else
{
//输出算式
out.print("("+num[0]+ope[0]+num[1]+")"+ope[1]+num[2]+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="/")
{
mol = num[0] * num[2];
den = num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
mol = check;
den = num[2];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
}
else
{
//输出算式
out.print("("+num[0]+ope[0]+num[1]+")"+ope[1]+num[2]+ope[2]);
if(ope[1]=="+")
{
if(ope[0]=="/")
{
den = num[1];
mol = num[2] * den + num[0];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
save = check + num[2];
correct[x] = (save+"");
}
}
else
{
if(ope[0]=="/")
{
den = num[1];
mol = num[2] * num[0];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
save = check * num[2];
correct[x] = (save+"");
}
}
}
}
//括后两个
else if(brackets==1)
{
int check = 0;
//保证不产生负数和假分数
if(ope[1]=="+")
{
check = num[1] + num[2];
}
else if(ope[1]=="-")
{
if(num[1]<num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
check = num[1] - num[2];
}
else if(ope[1]=="*")
{
check = num[1] * num[2];
}
else if(ope[1]=="/")
{
if(num[1]>num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
check = num[1] / num[2];
}
if(ope[0]=="-")
{
if(check>num[0])
{
//输出算式
out.print("("+num[1]+ope[1]+num[2]+")"+ope[0]+num[0]+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="/")
{
den = num[2];
mol = num[1] - num[0] * den;
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
save = check - num[0];
correct[x] = (save+"");
}
}
else
{
//输出算式
out.print(num[0]+ope[0]+"("+num[1]+ope[1]+num[2]+")"+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="/")
{
den = num[2];
mol = num[0] * den - num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
save = num[0] - check;
correct[x] = (save+"");
}
}
}
else if(ope[0]=="/")
{
if(check<num[0])
{
//输出算式
out.print("("+num[1]+ope[1]+num[2]+")"+ope[0]+num[0]+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="/")
{
den = num[2] * num[0];
mol = num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
den = num[0];
mol = check;
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else
{
//输出算式
out.print(num[0]+ope[0]+"("+num[1]+ope[1]+num[2]+")"+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="/")
{
mol = num[2] * num[0];
den = num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
mol = num[0];
den = check;
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
}
else
{
//输出算式
out.print(num[0]+ope[0]+"("+num[1]+ope[1]+num[2]+")"+ope[2]);
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="+")
{
if(ope[1]=="/")
{
den = num[2];
mol = num[1] + num[0] * den;
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
save = num[0] + check;
correct[x] = (save+"");
}
}
else
{
if(ope[1]=="/")
{
den = num[2];
mol = num[0] * num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else
{
save = num[0] * check;
correct[x] = (save+"");
}
}
}
}
//没有括号
else
{
int check = 0;
if(ope[0]=="+")
{
check = num[0] + num[1];
if(ope[1]=="+"||ope[1]=="*")
{
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
save = num[0] + num[1] + num[2];
correct[x] = (save+"");
}
else
{
save = num[0] + num[1] * num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="-")
{
if(check<num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
save = num[0] + num[1] - num[2];
correct[x] = (save+"");
}
else if(ope[1]=="/")
{
if(num[1]>num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
den = num[2];
mol = num[0] * den + num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else if(ope[0]=="-")
{
check = num[0] - num[1];
if(ope[1]=="+")
{
if(check<0)
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
save = num[0] - num[1] + num[2];
correct[x] = (save+"");
}
else if(ope[1]=="-")
{
if(check<0)
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
check = num[0] - num[1];
if(check<num[2])
{
ope[1] = "+";
}
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
save = num[0] - num[1] + num[2];
correct[x] = (save+"");
}
else
{
save = num[0] - num[1] - num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="*")
{
check = num[1] * num[2];
if(num[0]<check)
{
int change1;
change1 = num[0];
num[0] = num[2];
num[2] = change1;
String change2;
change2 = ope[0];
ope[0] = ope[1];
ope[1] = change2;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="-")
{
save = num[0] - num[1] * num[2];
correct[x] = (save+"");
}
else
{
save = num[0] * num[1] - num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="/")
{
if(num[1]>num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
den = num[2];
mol = num[0] * den - num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else if(ope[0]=="*")
{
check = num[0] * num[1];
if(ope[1]=="+"||ope[1]=="*")
{
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
save = num[0] * num[1] + num[2];
correct[x] = (save+"");
}
else
{
save = num[0] * num[1] * num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="-")
{
if(check<num[2])
{
int change1;
change1 = num[0];
num[0] = num[2];
num[2] = change1;
String change2;
change2 = ope[0];
ope[0] = ope[1];
ope[1] = change2;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="-")
{
save = num[0] - num[1] * num[2];
correct[x] = (save+"");
}
else
{
save = num[0] * num[1] - num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="/")
{
if(check>num[2])
{
ope[1] = "*";
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="*")
{
save = num[0] * num[1] * num[2];
correct[x] = (save+"");
}
else
{
mol = check;
den = num[2];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
}
else if(ope[0]=="/")
{
if(num[0]>num[1])
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
if(ope[1]=="+"||ope[1]=="/"||ope[1]=="*")
{
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
den = num[1];
mol = num[0] + num[2] * den;
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else if(ope[1]=="/")
{
den = num[1] * num[2];
mol = num[0];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else if(ope[1]=="*")
{
den = num[1];
mol = num[0] * num[2];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else if(ope[1]=="-")
{
int change1;
change1 = num[0];
num[0] = num[2];
num[2] = num[1];
num[1] = change1;
String change2;
change2 = ope[0];
ope[0] = ope[1];
ope[1] = change2;
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
den = num[2];
mol = num[0] * den - num[1];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
}
}
//不加括号
else
{
int check = 0;
if(ope[0]=="+")
{
check = num[0] + num[1];
if(ope[1]=="+"||ope[1]=="*")
{
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
save = num[0] + num[1] + num[2];
correct[x] = (save+"");
}
else
{
save = num[0] + num[1] * num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="-")
{
if(check<num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
save = num[0] + num[1] - num[2];
correct[x] = (save+"");
}
else if(ope[1]=="/")
{
if(num[1]>num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
den = num[2];
mol = num[0] * den + num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else if(ope[0]=="-")
{
check = num[0] - num[1];
if(ope[1]=="+")
{
if(check<0)
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
save = num[0] - num[1] + num[2];
correct[x] = (save+"");
}
else if(ope[1]=="-")
{
if(check<0)
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
check = num[0] - num[1];
if(check<num[2])
{
ope[1] = "+";
}
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
save = num[0] - num[1] + num[2];
correct[x] = (save+"");
}
else
{
save = num[0] - num[1] - num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="*")
{
check = num[1] * num[2];
if(num[0]<check)
{
int change1;
change1 = num[0];
num[0] = num[2];
num[2] = change1;
String change2;
change2 = ope[0];
ope[0] = ope[1];
ope[1] = change2;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="-")
{
save = num[0] - num[1] * num[2];
correct[x] = (save+"");
}
else
{
save = num[0] * num[1] - num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="/")
{
if(num[1]>num[2])
{
int change;
change = num[1];
num[1] = num[2];
num[2] = change;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
den = num[2];
mol = num[0] * den - num[1];
//约分
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else if(ope[0]=="*")
{
check = num[0] * num[1];
if(ope[1]=="+"||ope[1]=="*")
{
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
save = num[0] * num[1] + num[2];
correct[x] = (save+"");
}
else
{
save = num[0] * num[1] * num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="-")
{
if(check<num[2])
{
int change1;
change1 = num[0];
num[0] = num[2];
num[2] = change1;
String change2;
change2 = ope[0];
ope[0] = ope[1];
ope[1] = change2;
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[0]=="-")
{
save = num[0] - num[1] * num[2];
correct[x] = (save+"");
}
else
{
save = num[0] * num[1] - num[2];
correct[x] = (save+"");
}
}
else if(ope[1]=="/")
{
if(check>num[2])
{
ope[1] = "*";
}
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="*")
{
save = num[0] * num[1] * num[2];
correct[x] = (save+"");
}
else
{
mol = check;
den = num[2];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
}
else if(ope[0]=="/")
{
if(num[0]>num[1])
{
int change;
change = num[0];
num[0] = num[1];
num[1] = change;
}
if(ope[1]=="+"||ope[1]=="/"||ope[1]=="*")
{
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
if(ope[1]=="+")
{
den = num[1];
mol = num[0] + num[2] * den;
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else if(ope[1]=="/")
{
den = num[1] * num[2];
mol = num[0];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
else if(ope[1]=="*")
{
den = num[1];
mol = num[0] * num[2];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
else if(ope[1]=="-")
{
int change1;
change1 = num[0];
num[0] = num[2];
num[2] = num[1];
num[1] = change1;
String change2;
change2 = ope[0];
ope[0] = ope[1];
ope[1] = change2;
//输出算式
for(int i=0;i<number;i++)
{
out.print(num[i]+ope[i]);
}
%>
<form action="3.jsp">
<input type="text" name="<%=answer[x]%>">
<br></br>
<%
den = num[2];
mol = num[0] * den - num[1];
for(int i=mol;i>0;i--)
{
if(mol%i==0&&den%i==0)
{
mol = mol / i;
den = den / i;
break;
}
}
correct[x] = (mol+"/"+den);
}
}
}
}
}
%>
<%
session.setAttribute("v", correct);
%>
<input type="submit" value="确认">
</form>
</body>
</html>
<%@ 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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String[] correct = (String[])session.getAttribute("v");
String[] answer = new String[correct.length];
%>
<table>
<th>序号<th>正确答案<th>输入答案<th>判断
<%
for(int x=0;x<correct.length;x++)
{
answer[x] = request.getParameter("name"+x);
out.print(correct[x]);
%>
<tr>
<td align="center"><%=x+1 %></td>
<td align="center"><%=correct[x] %></td>
<td align="center"><%=answer[x] %></td>
<%
if(answer[x].equals(correct[x]))
{
%>
<td align="center">正确</td>
<%
}
else
{
%>
<td align="center">错误</td>
<%
}
%>
</tr>
<%
}
%>
</table>
</body>
</html>
结果截图：
时间记录日志：
| 日期 | 开始时间 | 结束时间 | 中断时间 | 净时间 | 活动 | 备注 |
| 3/28 | 8:00 | 9:50 | 10min | 100min | 上课 | |
| 3/30 | 15:00 | 17:00 | 120min | 编程 | 把原来C++内容改成java | |
| 4/4 | 8:00 | 9:50 | 10min | 100min | 上课 | |
| 4/5 | 15:00 | 17:00 | 120min | 编程 | 把原来C++内容改成java | |
| 4/6 | 15:00 | 17:00 | 120min | 编程 | 学习网页的编写 | |
| 4/9 | 9:00 | 22:00 | 180min | 600min | 编程 | |
| 4/11 | 8:00 | 9:50 | 10min | 100min | 上课 | |
| 4/14 | 15:00 | 22:00 | 120min | 300min | 编程 | 整合java内容和jsp内容 |
时间： 2024-08-10 19:17:55