xjxt/xjxt6.cpp

#include <stdio.h>
#include <string.h>
typedef struct
{
	int id;
	int mclass;
	char name[20];
	float a,b,c;
	float total;
}Student;
void sort(Student *person,int len)
{
	int i;
	int j;
	for(i=0;i<len;i++)
	{
		int k=i;
		for(j=i;j<len;j++)
		{
			if(person[k].mclass>person[j].mclass||(person[k].mclass==person[j].mclass&&person[k].total<person[j].total))
			{
				k=j;
			}
			if(k!=i)
			{
				Student temp=person[i];
				person[i]=person[k];
				person[k]=temp;
			}
		}
	}
}
void modify(Student *person,int len,Student modifyperson)
{
	int i;
	for(i=0;i<len;i++)
	{
		if(person[i].id==modifyperson.id)
		{
			person[i]=modifyperson;
			sort(person,3);
			return;
		}
	}
}
void print(Student *person,int len,Student modifyperson)
{
	int classname=0;
	int i;
	for(i=0;i<len;i++)
	{
		if(person[i].mclass!=classname)
		{
			classname=person[i].mclass;
			printf("%d ",classname);
		}else{
			printf("   ");
		}
		printf("%d %s %.1f %.1f %.1f",person[i].id,person[i].name,person[i].a,person[i].b,person[i].c);
		if(person[i].id==modifyperson.id)
		{
			printf(" modified");
		}
		printf("\n");
	}
}
int main()
{
	Student students[]=
	{
		{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}
	};
	sort(students,3);
	Student modifystudent;
	scanf("%d %d %s %f %f %f",&modifystudent.id,&modifystudent.mclass,&modifystudent.name,&modifystudent.a,&modifystudent.b,&modifystudent.c);
	sort(students,3);
	modify(students,3,modifystudent);
	print(students,3,modifystudent);
	return 0;
}