#include<stdio.h>
int main()
{
struct data
	{
		long int num;
		long int clas;
		char name[20];
		float grade1;
		float grade2;
		float grade3;
	}; 
	struct data stud[3]={10001,11,"zhang",99.5,88.5,89.5,10002,12,"yang",77.9,56.5,87.5,10003,11,"liang",92.5,99.0,60.5};
	struct data stu;//{10001,11,"zhang",99,88,89};
	printf("请输入待修改的学生信息\n"); 
	scanf("%ld %ld %s %f %f %f",&stu.num,&stu.clas,&stu.name,&stu.grade1,&stu.grade2,&stu.grade3);
    for(int i=0;i<3;i++)
    {
    	if(stu.num==stud[i].num)
    	{
    		stud[i].grade1=stu.grade1;
    		stud[i].grade2=stu.grade2;
    		stud[i].grade3=stu.grade3;
		}
		break;
	}
	struct data temp;
	for(int i=0;i<3;i++)
	{
		for(int j=i+1;j<3;j++)
		{
			if(stud[i].clas>stud[j].clas)
			{
				temp=stud[i];
				stud[i]=stud[j];
				stud[j]=temp;
			}
		}
	}
	for(int i=0;i<3;i++)
	{
		for(int j=i+1;j<3;j++)
		{
			if(stud[i].num>stud[j].num&&stud[i].clas==stud[j].clas)
			{
				temp=stud[i];
				stud[i]=stud[j];
				stud[j]=temp;
			}
		}
	}
	for(int i=0;i<3;i++)
	{
		if(i>0&&stud[i].clas==stud[i-1].clas) 
		printf("   %ld %s %3.1f %3.1f %3.1f",stud[i].num,stud[i].name,stud[i].grade1,stud[i].grade2,stud[i].grade3);
		else printf("%d %ld %s %3.1f %3.1f %3.1f",stud[i].clas,stud[i].num,stud[i].name,stud[i].grade1,stud[i].grade2,stud[i].grade3);
		if(stud[i].num==stu.num) printf(" modified");
		printf("\n");
	}
	return 0;}