学生信息管理系统

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核心内容：
1、学生信息管理系统

C语言版：

# include <stdio.h># include <malloc.h># include <string.h>struct Student{    int age;    float score;    char name[100];};void inputdata(Student * arr,int len)//无论是赋值还是输出数值{    arr[0].age = 20;    arr[0].score = 88.8f;    strcpy(arr[0].name,"zhangsan");    arr[1].age = 21;    arr[1].score = 98.8f;    strcpy(arr[1].name,"lisi");    arr[2].age = 18;    arr[2].score = 66.6f;    strcpy(arr[2].name,"lidong");}void sort(Student * arr,int len){    for (int j=1; j<len;j++)    {       for (int k=0; k<len-j;k++)       {           Student tmp;           if (arr[k].score > arr[k+1].score)           {               tmp = arr[k];               arr[k] = arr[k+1];               arr[k+1] = tmp;           }       }    }}void outputdata(Student * arr,int len){    //接下来我们将结果进行输出    for (int i=0; i<3; i++)    {        printf("%d\t",arr[i].age);        printf("%f\t",arr[i].score);        printf("%s\t",arr[i].name);        printf("\n");    }}int main(void){    Student * arr = (Student *)malloc(sizeof(Student)*3);    inputdata(arr,3);    sort(arr,3);    outputdata(arr,3);    return 0;}

运行结果：
这里写图片描述
Java语言版：

import java.util.ArrayList;import java.util.Collections;class Student  implements Comparable<Student>{    public int age;    public float score;    public String name;    public Student(int age,float score,String name)    {        this.age = age;        this.score = score;        this.name = name;    }    @Override    public int compareTo(Student obj)    {        if (this.score > obj.score)            return 1;        else             return -1;    }    public String toString()    {        return this.age+"\t"+this.score+"\t"+this.name;    }}public class App1 {    public static void main(String[] args)    {       ArrayList<Student> arr = new ArrayList<Student>();//动态分配一块内存空间,用指针变量指向这块内存空间       arr.add(new Student(20,88.8f,"zhangsan"));       arr.add(new Student(21,98.8f,"lisi"));       arr.add(new Student(18,66.6f,"lidong"));       for (int i=0; i<arr.size();i++)       {           System.out.println(arr.get(i));       }       Collections.sort(arr);       for (int i=0; i<arr.size();i++)       {           System.out.println(arr.get(i));       }     }}

运行结果：

20  88.8    zhangsan21  98.8    lisi18  66.6    lidong18  66.6    lidong20  88.8    zhangsan21  98.8    lisi

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