C語言之排學生成績

這個主要是練習使用結構體和文件基本操作的。

#include<stdio.h>
#include<string.h>
struct grade
{
	int ID;
	char name[20];
	int score1;
	int score2;
	int score3;
	float average;
};
void main()
{   
	int i,n;
	printf("please input students'number\n");
	scanf("%d",&n);
	i=n;
	struct grade student[100];
	for(i=0;i<n;i++)
	{
		printf("please input students'ID,name,C,English and math score\n");
		scanf("%d %s %d %d %d",&student[i].ID,student[i].name,&student[i].score1,&student[i].score2,&student[i].score3);
		student[i].average=float(student[i].score1+student[i].score2+student[i].score3)/3;
		printf("student'id is %d,name is %s and average is %.2f\n",student[i].ID,student[i].name,student[i].average); 
	}
	printf("\n");

	int j;
	struct grade temp;
	for(j=0;j<n;j++)
	{	
		for(i=0;i<n-j-1;i++)
		{
			if(student[i].average<student[i+1].average)
			{
				temp=student[i];
				student[i]=student[i+1];
				student[i+1]=temp;
			}
		}
	}
	for(i=0;i<n;i++)
		printf("%d %s %.2f\n",student[i].ID,student[i].name,student[i].average);

	FILE *fp;
	fp=fopen("s.txt","w");
	for(i=0;i<n;i++)
		fprintf(fp,"%d %s %.2f\n",student[i].ID,student[i].name,student[i].average);
	fclose(fp);
	printf("\n");
		
	
	
}	          
	   

這是運行結果，界面可能不太友好的說