结对项目开发-四则运算三
把程序变成一个网页程序，用户通过设定参数，就可以得到各种题目，并可实现在线答题并评判。
import java.sql.*;
import java.util.*;
public class Szys {
public static void main(String[] args) {
System.out.println("请输入要生成的题数：");
Scanner N = new Scanner(System.in);
int n=N.nextInt();
System.out.println("请输入出题的类型：（1.整数 2.真分数）");
Scanner N1 = new Scanner(System.in);
int n1=N1.nextInt();
System.out.println("注：除法请填写化简之后的结果（分母为1时也要写出）");
System.out.println("请输入数字的取值范围（起始和结束的正整数）：");
Scanner N5 = new Scanner(System.in);
int n5=N5.nextInt();
Scanner N6 = new Scanner(System.in);
int n6=N6.nextInt();
System.out.println("请选择加减有无负数（1.有 2.无）：");
Scanner N3 = new Scanner(System.in);
int n3=N3.nextInt();
System.out.println("请选择是否有乘除法（1.有 2.无）：");
Scanner N4 = new Scanner(System.in);
int n4=N4.nextInt();
System.out.println("请选择除法有无余数（1.有 2.无）：");
Scanner N7 = new Scanner(System.in);
int n7=N7.nextInt();
if(n1==1) zheng(n5,n6,n,n3,n4,n7);
else if(n1==2) zhenfs(n5,n6,n,n3,n4,n7);
else System.out.println("输入错误！");
}
public static int random(int w,int v)
{
int value=w + (int) ( Math.random() * v );
return value;
}
@SuppressWarnings("static-access")
public static void jisuan1(int n,int value1,int value2,int ys,int i)
{
String ys1;
String result[] =new String[n];
String output[] =new String[n];
if(ys==1) {ys1="+";result[i]=value1+value2+"";}
else if(ys==2) {ys1="-";result[i]=(value1-value2)+"";}
else if(ys==3) {ys1="*";result[i]=(value1*value2)+"";}
else {ys1="/";result[i]=yuefen(value1,value2);}
output[i]= value1 + " "+ys1 +" "+ value2+"=";
System.out.println(output[i]);
//连接数据库存入数据
DB db=new DB();
String sql = "insert into szys (num,question,answer) values (?,?,?)";
PreparedStatement pstmt = null;
try {
pstmt = db.getConn().prepareStatement(sql);
pstmt.setInt(1,i+1);
pstmt.setString(2, output[i]);
pstmt.setString(3, result[i]);
pstmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}
Scanner N2 = new Scanner(System.in);
String n2=N2.nextLine();
if(n2.equals(result[i]))
System.out.println("回答正确！");
else System.out.println("回答错误！");
}
public static void jisuan2(int n,int value1,int value2,int value3,int value4,int ys,int i)
{
String ys1;
String result[] =new String[n];
String output[] =new String[n];
if(ys==1) {ys1="+";result[i]=yuefen(((value1*value4)+(value2*value3)),value2*value4)+"";}
else if(ys==2) {ys1="-";result[i]=yuefen(((value1*value4)-(value2*value3)),value2*value4)+"";}
else if(ys==3) {ys1="*";result[i]=yuefen((value1*value3),(value2*value4))+"";}
else {ys1="/";result[i]=yuefen((value1*value4),(value2*value3))+"";}
output[i]= yuefen(value1,value2)+" "+ys1+" "+yuefen(value3,value4)+"=";
System.out.println(output[i]);
Scanner N2 = new Scanner(System.in);
String n2=N2.nextLine();
if(n2.equals(result[i]))
System.out.println("回答正确！");
else System.out.println("回答错误！");
}
public static String yuefen(int a1,int a2)
{
int min=a1<a2?a1:a2;
int yueshu=1;
for(int i=min;i>=1;i--)
{
if(a1%i==0 && a2%i==0)
{
yueshu=i;
break;
}
}
a1/=yueshu;
a2/=yueshu;
return(a1+"/"+a2);
}
public static void zheng(int x,int y,int n,int n3,int n4,int n7)
{
int value1,value2;
int ys;
for ( int i = 0; i < n; i++ )
{
value1 = random(x,y);
value2 = random(x,y);
if(n3==1&&n4==1&&n7==1)
{
ys = random(1,4);
if(value1%value2!=0)
jisuan1(n,value1,value2,ys,i);
else i--;
}
else if(n3==1&&n4==1&&n7==2)
{
ys = random(1,4);
if(value1>=value2&&value1%value2==0)
jisuan1(n,value1,value2,ys,i);
else i--;
}
else if(n3==1&&n4==2)
{
ys = random(1,2);
jisuan1(n,value1,value2,ys,i);
}
else if(n3==2)
{
if(value1>=value2&&n4==1&&n7==1)
{
ys = random(1,4);
if(value1%value2!=0)
jisuan1(n,value1,value2,ys,i);
else i--;
}
else if(value1>=value2&&n4==1&&n7==2)
{
ys = random(1,4);
if(value1%value2==0)
jisuan1(n,value1,value2,ys,i);
else i--;
}
else if(value1>=value2&&n4==2)
{
ys = random(1,2);
jisuan1(n,value1,value2,ys,i);
}
else if(value1<value2) i--;
}
else
{
System.out.println("输入错误！");
break;
}
}
}
public static void zhenfs(int x,int y,int n,int n3,int n4,int n7)
{
int value1,value2,value3,value4,ys;
for ( int i = 0; i < n; i++ )
{
value1 = random(x,y);
value2 = random(x,y);
value3 = random(x,y);
value4 = random(x,y);
if(value1<value2&&value3<value4)
{
if(n3==1&&n4==1&&n7==1)
{
ys = random(1,4);
if(((double)value1/value2)>=((double)value3/value4)&&((double)value1/value2)%((double)value3/value4)!=0)
jisuan2(n,value1,value2,value3,value4,ys,i);
else i--;
}
else if(n3==1&&n4==1&&n7==2)
{
ys = random(1,4);
if(((double)value1/value2)>=((double)value3/value4)&&((double)value1/value2)%((double)value3/value4)==0)
jisuan2(n,value1,value2,value3,value4,ys,i);
else i--;
}
else if(n3==1&&n4==2)
{
ys = random(1,2);
jisuan2(n,value1,value2,value3,value4,ys,i);
}
else if(n3==2)
{
if(((double)value1/value2)>=((double)value3/value4)&&n4==1&&n7==1)
{
ys = random(1,4);
if(((double)value1/value2)%((double)value3/value4)!=0)
jisuan2(n,value1,value2,value3,value4,ys,i);
else i--;
}
else if(((double)value1/value2)>=((double)value3/value4)&&n4==1&&n7==2)
{
ys = random(1,4);
if(((double)value1/value2)%((double)value3/value4)==0)
jisuan2(n,value1,value2,value3,value4,ys,i);
else i--;
}
else if(((double)value1/value2)>=((double)value3/value4)&&n4==2)
{
ys = random(1,2);
jisuan2(n,value1,value2,value3,value4,ys,i);
}
else if(((double)value1/value2)<((double)value3/value4)) i--;
}
else
{
System.out.println("输入错误！");
break;
}
}
else i--;
}
}
}
