四则运算
Posted zhang12345
tags:
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import java.io.*;
import java.util.Random;
import java.util.Scanner;
public class yunsuan
{ static Scanner sc=new Scanner(System.in);
static int[] c=new int[100];
static int m=0;
static int index1=0;
static int index2=0;
public static void main(String[] args)throws IOException {
try {
BufferedWriter out = new BufferedWriter(new FileWriter("D:/ps/Test.txt"));
for(int n=0;n<100;n++)
{
int i=(int)(1+Math.random()*100);
int j=(int)(1+Math.random()*100);
int k=(int)(1+Math.random()*100);
Random r=new Random();
int a=r.nextInt(4);
int b=r.nextInt(4);
if(a==0)
{
if(b==0)
{out.write(i+"+"+j+"+"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i+j+k;
}
if(b==1)
{out.write(i+"+"+j+"-"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i+j-k;
}
if(b==2)
{out.write(i+"+"+j+"*"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i+j*k;
}
if(b==3)
{out.write(i+"+"+j+"/"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i+j/k;
}
}
if(a==1)
{
if(b==0)
{out.write(i+"-"+j+"+"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i-j+k;
}
if(b==1)
{
out.write(i+"-"+j+"-"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i-j-k;
}
if(b==2) {
out.write(i+"-"+j+"*"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i-j*k;
}
if(b==3)
{
out.write(i+"-"+j+"/"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i-j/k;
}
}
if(a==2)
{ if(b==0)
{out.write(i+"*"+j+"+"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i*j+k;
}
if(b==1)
{
out.write(i+"*"+j+"-"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i*j-k;
}
if(b==2) {
out.write(i+"*"+j+"*"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i*j*k;
}
if(b==3)
{
out.write(i+"*"+j+"/"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i*j/k;
}
}
if(a==3)
{
if(b==0)
{out.write(i+"/"+j+"+"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i/j+k;
}
if(b==1)
{
out.write(i+"/"+j+"-"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i/j-k;
}
if(b==2)
{
out.write(i+"/"+j+"*"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i/j*k;
}
if(b==3)
{
out.write(i+"/"+j+"/"+k+"=");
out.newLine();
out.write("*");
out.newLine();
c[n]=i/j/k;
}
}
}
out.close();
System.out.println("文件创建成功");
FileReader fr=new FileReader("D:/ps/Test.txt");
BufferedReader br=new BufferedReader(fr);
String line=br.readLine();
while(line!=null)
{
if(line.length()!=1)
{
System.out.println(line);
int x=sc.nextInt();
System.out.println(c[m]);
if(x==c[m])
{System.out.println("答案正确！");
index1++;}
else
{System.out.println("答案错误！");
index2++;
}
System.out.println("答对："+index1+"道");
System.out.println("答错："+index2+"道");
m++;
}
line= br.readLine();
}
br.close();
}
catch (IOException e) {
}
/* File file = new File("E:01.html");
Runtime ce=Runtime.getRuntime();
System.out.println(file.getAbsolutePath());
ce.exec("cmd /c start "+file.getAbsolutePath());*/
}
}
问题：不知道怎么将数据写入文件，后来通过数组的方式来写入文件。由于数组元素个数不正确，导致溢出，通过调整数组元素个数解决问题。
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