通过对上次代码的完善，这次实现了参与运算变量的个数，将随机生成的数保存于数组中；对数值范围的操作，使随机生成的数在此范围内；也实现了对乘除法的控制，只是未实现有无括号和对结果的分析。
开始界面：
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 7 <title>四则运算</title> 8 </head> 9 <body> 10 <h1>四则运算</h1> 11 <form action="yunsuan.jsp" method="post"> 12 出题页数：<input type="text" name = "shuliang"><br> 13 <h2>1.整数运算 2.真分数运算</h2> 14 题目样式<input type="text" name="choose"><br><br> 15 数值范围<input type="text" name="xiao"> 16 <input type="text" name="da"><br><br> 17 变量个数<input type="text" name="geshu"><br> 18 <h3>1.有乘除法 2.无乘除法</h3> 19 乘除法<input type="text" name="chengchu"><br> 20 <input type="submit" value="提交"> 21 </form> 22 </body> 23 </html>
实现代码：
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <% 11 JspWriter mout=pageContext.getOut(); 12 String zh = request.getParameter("shuliang"); 13 String zhh = request.getParameter("choose"); 14 String Min=request.getParameter("xiao"); 15 String Max=request.getParameter("da"); 16 String shu = request.getParameter("geshu"); 17 String chu = request.getParameter("chengchu"); 18 int x=Integer.parseInt(zh); 19 int y=Integer.parseInt(zhh); 20 int min=Integer.parseInt(Min); 21 int max=Integer.parseInt(Max); 22 int z=Integer.parseInt(shu); 23 int xx=Integer.parseInt(chu); 24 int m,n,j,jj; 25 char []ch=new char[4]; 26 ch[0]='+'; 27 ch[1]='-'; 28 ch[2]='*'; 29 ch[3]='/'; 30 if(y==1) 31 { 32 int []M=new int[10]; 33 for(int ii=1;ii<=x;ii++) 34 { 35 mout.print("30道题目"); 36 mout.print("<br>"); 37 String []A=new String[30]; 38 for(int i=0;i<30;i++) 39 { 40 A[i]=""; 41 for(int o=0;o<z;o++) 42 { 43 M[o]=(int)(Math.random()*max+min); 44 if(xx==1) 45 j=(int)(Math.random()*4+1); 46 else 47 j=(int)(Math.random()*2+1); 48 if(o==z-1) 49 A[i]=A[i]+M[o]+" ="; 50 else 51 A[i]=A[i]+M[o]+" "+ch[j-1]; 52 } 53 for(int k=0;k<i;k++) 54 { 55 if(A[i].equals(A[k])) 56 { 57 i--; 58 break; 59 } 60 } 61 } 62 for(int i=0;i<30;i++) 63 { 64 mout.print((i+1)+". "+A[i]); 65 mout.print("<br>"); 66 } 67 mout.print("-"+ii+"-"); 68 mout.print("<br><br><br>"); 69 } 70 } 71 if(y==2) 72 { 73 for(int ii=1;ii<=x;ii++) 74 { 75 int a,b,c,d; 76 String aa,bb; 77 mout.print("30道题目"); 78 mout.print("<br>"); 79 String []B=new String[30]; 80 for(int i=0;i<30;i++) 81 { 82 a=(int)(Math.random()*100+1); 83 b=(int)(Math.random()*100+1); 84 if(a>b) 85 aa=b+"/"+a; 86 else if(a<b) 87 aa=a+"/"+b; 88 else 89 aa="1"; 90 c=(int)(Math.random()*100+1); 91 d=(int)(Math.random()*100+1); 92 if(c>d) 93 bb=d+"/"+c; 94 else if(c<d) 95 bb=c+"/"+d; 96 else 97 bb="1"; 98 j=(int)(Math.random()*4+1); 99 B[i]=aa+" "+ch[j-1]+" "+bb+"="; 100 for(int k=0;k<i;k++) 101 { 102 if(B[i].equals(B[k])) 103 { 104 i--; 105 break; 106 } 107 } 108 } 109 for(int i=0;i<30;i++) 110 { 111 mout.print((i+1)+". "+B[i]); 112 mout.print("<br>"); 113 } 114 mout.print("-"+ii+"-"); 115 mout.print("<br><br><br>"); 116 mout.print("-"+ii+"-"); 117 mout.print("<br><br><br>"); 118 } 119 } 120 %> 121 </body> 122 </html>
截图：
