doc四则运算
2024-09-27 06:44:03
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.*;
import java.util.Scanner;
import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.lang.Math;
import java.math.BigDecimal;
import java.io.IOException;
public class Get {
static int q;
static double s,s1;
public static void Z_jia() throws IOException
{
System.out.println("小朋友 准备一下开始做加法题了");
File newFile = new File("C:\\Users\\xxoo\\Desktop\\123\\加法题.txt");
FileOutputStream out = new FileOutputStream(newFile);
for(int i=1;i<=10;i++)
{ String[] a=new String[5];
int x=(int)(Math.random()*100);
int y=(int)(Math.random()*100);
s=x+y;
a[0]="+";
a[1]="=";
a[2]="\n答案是：";
a[3]="\t";
a[4]="*************";
BigDecimal f1 = BigDecimal.valueOf(x);
out.write(String.valueOf(f1).getBytes());//x
out.write(String.valueOf(a[0]).getBytes());//+
BigDecimal f2 = BigDecimal.valueOf(y);
out.write(String.valueOf(f2).getBytes());//y
out.write(String.valueOf(a[1]).getBytes());//=
out.write(String.valueOf(a[3]).getBytes());//\t
if(q==1)s=Math.abs(s);
out.write(String.valueOf(a[2]).getBytes());
BigDecimal f3 = BigDecimal.valueOf(s);
out.write(String.valueOf(f3).getBytes());//s
out.write(String.valueOf(a[3]).getBytes());//\t
out.write(String.valueOf(a[4]).getBytes());//********** }
}
public static void Z_jian() throws IOException
{
System.out.println("开始做减法题了 小朋友们");
File newFile = new File("C:\\Users\\xxoo\\Desktop\\123\\减法题.txt");
FileOutputStream out = new FileOutputStream(newFile);
for(int i=1;i<=10;i++)
{ String[] a=new String[5];
a[0]="-";
a[1]="=";
a[2]="\n答案是：";
a[3]="\t";
a[4]="*************";
int x=(int)(Math.random()*100);
int y=(int)(Math.random()*100);
s=x-y;
BigDecimal f1 = BigDecimal.valueOf(x);
out.write(String.valueOf(f1).getBytes());//x
out.write(String.valueOf(a[0]).getBytes());//-
BigDecimal f2 = BigDecimal.valueOf(y);
out.write(String.valueOf(f2).getBytes());//y
out.write(String.valueOf(a[1]).getBytes());//=
out.write(String.valueOf(a[3]).getBytes());
if(q==1)s=Math.abs(s);
out.write(String.valueOf(a[2]).getBytes());
BigDecimal f3 = BigDecimal.valueOf(s);
out.write(String.valueOf(f3).getBytes());//s
out.write(String.valueOf(a[3]).getBytes());//\t
out.write(String.valueOf(a[4]).getBytes());//**********
}
}
public static void Z_cheng() throws IOException
{
System.out.println("开始做乘法题了 小朋友们");
File newFile = new File("C:\\Users\\xxoo\\Desktop\\123\\乘法题.txt");
FileOutputStream out = new FileOutputStream(newFile);
for(int i=1;i<=10;i++)
{
String[] a=new String[5];
a[0]="*";
a[1]="=";
a[2]="\n答案是：";
a[3]="\t";
a[4]="*************";
int x=1+(int)(Math.random()*50);
int y=1+(int)(Math.random()*50);
s=x*y;
BigDecimal f1 = BigDecimal.valueOf(x);
out.write(String.valueOf(f1).getBytes());//x
out.write(String.valueOf(a[0]).getBytes());//*
BigDecimal f2 = BigDecimal.valueOf(y);
out.write(String.valueOf(f2).getBytes());//y
out.write(String.valueOf(a[1]).getBytes());//=
out.write(String.valueOf(a[3]).getBytes());
out.write(String.valueOf(a[2]).getBytes());
BigDecimal f3 = BigDecimal.valueOf(s);
out.write(String.valueOf(f3).getBytes());//s
out.write(String.valueOf(a[3]).getBytes());//\t
out.write(String.valueOf(a[4]).getBytes());//**********
}
}
public static void Z_chu() throws IOException
{
System.out.println("开始做除法题了 小朋友们");
File newFile = new File("C:\\Users\\xxoo\\Desktop\\123\\除法题.txt");
FileOutputStream out = new FileOutputStream(newFile);
for(int i=1;i<=10;i++)
{
String[] a=new String[5];
a[0]="/";
a[1]="=";
a[2]="\n答案是：";
a[3]="\t";
a[4]="*************";
int x=1+(int)(Math.random()*20);
int y=1+(int)(Math.random()*20);
s=(double)x/y;
BigDecimal f1 = BigDecimal.valueOf(x);
out.write(String.valueOf(f1).getBytes());//x
out.write(String.valueOf(a[0]).getBytes());// /
BigDecimal f2 = BigDecimal.valueOf(y);
out.write(String.valueOf(f2).getBytes());//y
out.write(String.valueOf(a[1]).getBytes());//=
out.write(String.valueOf(a[3]).getBytes());
out.write(String.valueOf(a[2]).getBytes());
BigDecimal f3 = BigDecimal.valueOf(s);
out.write(String.valueOf(f3).getBytes());//s
out.write(String.valueOf(a[3]).getBytes());//\t
out.write(String.valueOf(a[4]).getBytes());//**********
}
}
public static void main(String[]args) throws IOException
{
System.out.println("请选择年纪 1-三年级以下 2-三年级以上");
Scanner scan=new Scanner(System.in);
q=scan.nextInt();int i=0,R=0;
File newFile = new File("C:\\Users\\xxoo\\Desktop\\123\\一百到题.txt");
FileOutputStream out = new FileOutputStream(newFile);
System.out.println("****************************************************");
System.out.println("加法题：");
Z_jia();
try {
BufferedReader br=new BufferedReader(new FileReader("C:\\Users\\xxoo\\Desktop\\123\\加法题.txt"));
String line="";
double putAnswer;
while((line = br.readLine()) != null){
System.out.println(line);
System.out.println("请输入答案");
Scanner an=new Scanner(System.in);
putAnswer=an.nextDouble();
if(putAnswer==s){
R++;
}
i++; }
System.out.println("总共答对"+R+"道题，得分是"+R*25);
br.close();}
catch(Exception e){
System.out.println(e.toString());
};
System.out.println("****************************************************");
System.out.println("减法题：");
Z_jian();
try {
BufferedReader br=new BufferedReader(new FileReader("C:\\Users\\xxoo\\Desktop\\123\\减法题.txt"));
String line="";
double putAnswer;
while((line = br.readLine()) != null){
System.out.println(line);
System.out.println("请输入答案");
Scanner an=new Scanner(System.in);
putAnswer=an.nextDouble();
if(putAnswer==s){
R++;
}
i++; }
System.out.println("总共答对"+R+"道题，得分是"+R*25);
br.close();}
catch(Exception e){
System.out.println(e.toString());
};
System.out.println("****************************************************");
System.out.println("乘法题：");
Z_cheng();
try {
BufferedReader br=new BufferedReader(new FileReader("C:\\Users\\xxoo\\Desktop\\123\\乘法题.txt"));
String line="";
double putAnswer;
while((line = br.readLine()) != null){
System.out.println(line);
System.out.println("请输入答案");
Scanner an=new Scanner(System.in);
putAnswer=an.nextDouble();
if(putAnswer==s){
R++;
}
i++;
}
System.out.println("总共答对"+R+"道题，得分是"+R*25);
br.close();}
catch(Exception e){
System.out.println(e.toString());
};
System.out.println("****************************************************");
System.out.println("除法题：");
Z_chu();
try {
BufferedReader br=new BufferedReader(new FileReader("C:\\Users\\xxoo\\Desktop\\123\\除法题.txt"));
String line="";
double putAnswer;
while((line = br.readLine()) != null){
System.out.println(line);
System.out.println("请输入答案");
Scanner an=new Scanner(System.in);
putAnswer=an.nextDouble();
if(putAnswer==s){
R++;
}
i++;
}
System.out.println("总共答对"+R+"道题，得分是"+R*25);
br.close();}
catch(Exception e){
System.out.println(e.toString());
}; System.out.println("****************************************************"); }
}
实验插入文本时一直会出现覆盖的现象，其中数据的输入和调用花费了大量的时间。
实验内容其实一点都不难，只是文本的调用让人头疼。
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