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

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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：

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    zhangsan
21  98.8    lisi
18  66.6    lidong
18  66.6    lidong
20  88.8    zhangsan
21  98.8    lisi