JAVA实验报告

}

System.out.print(\请输入第一个整数：\);

Scanner s1=new Scanner(System.in); int a1=s1.nextInt();

System.out.print(\请输入第二个整数：\); Scanner s2=new Scanner(System.in); int a2=s2.nextInt(); }

System.out.print(\计算结果：\+a1+\+a2+\+(a1+a2));

2、

package TEST2; import java.io.*; import java.util.*; public class test2 {

private File file=new File(\); private FileOutputStream fos; private PrintWriter pw; public void writeScore() {

try {

fos=new FileOutputStream(file,false); pw=new PrintWriter(fos);

Scanner input=new Scanner(System.in); for(int i=0;i<5;i++) { }

pw.flush(); fos.flush(); pw.close(); fos.close();

e.printStackTrace(); e.printStackTrace();

String score=input.nextLine(); pw.println(score);

} catch (FileNotFoundException e) { } catch (IOException e) {

}

}

}

public int[] readScore() { }

public static void main(String[]args) { }

test2 d=new test2(); int sum=0;

System.out.println(\请输入成绩：\); d.writeScore();

int[] sort=d.readScore(); Arrays.sort(sort);

System.out.println(\排序以后的成绩：\); for(int i:sort) { }

System.out.println();

System.out.println(\平均值：\+sum/sort.length);

sum+=i;

System.out.print(i+\); int[]sort=null; try { }

return sort;

int pos=0;

BufferedReader br=new BufferedReader(new InputStreamReader(new String line=null; sort=new int[5];

while((line=br.readLine())!=null) { }

br.close();

e.printStackTrace(); e.printStackTrace(); e.printStackTrace();

sort[pos]=Integer.parseInt(line); pos++;

FileInputStream(file)));

} catch (FileNotFoundException e) { } catch (NumberFormatException e) { } catch (IOException e) {

3、package start;

import java.io.BufferedReader; import java.io.FileOutputStream; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException;

public class Xiugai {

public static void main(String args[]) throws IOException { FileReader bout=new

FileReader(\); BufferedReader fout1 =new BufferedReader(bout); String value; int i=0;

String a[] = new String[6];

while((value=fout1.readLine())!=null) { a[i]=value; i++; }

System.out.println(\原来的成绩\); for(int j=0; j<5; j++) {

System.out.println(a[j]); }

a[2]=String.valueOf(((Integer.parseInt(a[0])+Integer.parseInt(a[1])+Integer.parseInt(a[2])+Integer.parseInt(a[3])+Integer.parseInt(a[4]))/5));

bout.close();

FileOutputStream testfile = new

FileOutputStream(\); testfile.close();

testfile.write(new String(\).getBytes()); FileWriter fout=new

FileWriter(\,true); for(int i1=0; i1<5; i1++) { fout.write(a[i1]+\); }

System.out.println(\修改后的成绩\); for(int j=0; j<5; j++) {

System.out.println(a[j]); }

fout.close(); }

4、

}

package TEST4;

import java.util.Scanner; public class test4 {

public static void main(String[] args){

System.out.println(\请输入一个小于99999的整数：\); Scanner s=new Scanner(System.in); int a=s.nextInt();

if(a>99999)System.out.println(\); if(a>9999) {

x[0]=a;x[1]=(a/10);x[2]=a/100;x[3]=a/1000;x[4]=a/10000;

for(int i=0;i<=4;i++)

System.out.println(\位\);int []x=new int[5];

}

}

{ }

System.out.print(x[i]);

if(a>999&a<10000) { }

if(a>99&a<1000) { }

if(a>9&a<100){ } }

System.out.println(\位\); System.out.print(a); }

if(a>0&a<10){

System.out.println(\位\);int []x=new int[2]; x[0]=a;x[1]=a/10; for(int i=0;i<=1;i++)

{ }

System.out.print(x[i]);

System.out.println(\位\);int []x=new int[3];

x[0]=a;x[1]=(a/10);x[2]=a/100; for(int i=0;i<=2;i++) { }

System.out.print(x[i]);

System.out.println(\位\);int []x=new int[4]; x[0]=a;x[1]=(a/10);x[2]=a/100;x[3]=a/1000; for(int i=0;i<=3;i++)

{ }

System.out.print(x[i]);