Jinhong_Homework2/task6.cpp

#include <stdio.h>
#include <string.h>

//定义结构体
struct Student
{
	int ID;//学号 
	int classes;
	char name[8];
	float math_grade;
	float physics_grade;
	float English_grade;
	float sum;
};

//对结构体中的从start同学到end同学排序
void Sort(struct Student information[4],int start,int end)
{
	//先班级 
	for(int i=start;i<=end;i++)
	{
		for(int j=start;j<=end-1;j++)
		{
			if(information[j].classes>information[j+1].classes)
			{
				struct Student tmp=information[j];
				information[j]=information[j+1];
				information[j+1]=tmp;
			}
		}
	}
	//同班同学再成绩 
	for(int i=start;i<=end;i++)
	 {
	 	int con=0;//记录连续了几人 
	 	for(int j=1;j<=end-i;j++)
	 	{
	 		if(information[i].classes==information[i+j].classes)
	 		{con++;
			 }
			 else
			 {
			 break;
			 }
		 }
			 
		 if(con)//有人是同班同学，在此内排序 
		 {
		 	for(int m=i;m<i+con;m++)
			{
				for(int n=i;n<=i+con-1;n++)
				{
					if(information[n].sum<information[n+1].sum)
			 		{
						struct Student tmp=information[n];
						information[n]=information[n+1];
						information[n+1]=tmp;
					 }
				 }
			 }
		 }	 
		 i=i+con;
	  } 
}

//对非同班同学的打印输出 
void output(struct Student information[4],int i)
{
	printf("%d %d ",information[i].classes,information[i].ID);
	for(int j=0;information[i].name[j]!='\0';j++)
	{
		printf("%c",information[i].name[j]);
	}
	printf(" %.1f %.1f %.1f ",information[i].math_grade,\
	information[i].physics_grade,information[i].English_grade);
}

//输出modified 
void out_modified(struct Student information[4],struct Student delete_student,int i)
{
	if(delete_student.ID==information[i].ID)
	{
		printf("modified");
	}
	printf("\n");
}
int main()
{
	struct Student information[4];
	information[0].ID=10001;strcpy(information[0].name, "Zhang");
	information[0].classes=11;information[0].math_grade=99.5;
	information[0].physics_grade=88.5;information[0].English_grade=89.5;
	information[0].sum=99.5+88.5+89.5;
	
	information[1].ID=10002;strcpy(information[1].name, "Yang");
	information[1].classes=12;information[1].math_grade=77.9;
	information[1].physics_grade=56.5;information[1].English_grade=87.5;
	information[1].sum=77.9+56.5+87.5;
	
	information[2].ID=10003;strcpy(information[2].name, "Liang");
	information[2].classes=11;information[2].math_grade=92.5;
	information[2].physics_grade=99.0;information[2].English_grade=60.5;
	information[2].sum=92.5+99.0+60.5;
	

	//输入待修改同学的信息 
	struct Student delete_student;
	scanf("%d %d %s %f %f %f", &delete_student.ID,\
	&delete_student.classes,&delete_student.name,&delete_student.math_grade,\
	&delete_student.physics_grade,&delete_student.English_grade);
	
    delete_student.sum=delete_student.math_grade+delete_student.physics_grade\
	+delete_student.English_grade;

	for(int i=0;i<=2;i++)
	{
	  	if(delete_student.ID==information[i].ID)
	  	{
	  	information[i]=delete_student;
	  	break;
		}
	}

	//排序 
	Sort(information,0,2);
	for(int i=0;i<=2;i++)
	 {
	 	int con=0;//记录连续了几人 
	 	for(int j=1;j<=2-i;j++)
	 	{
	 		if(information[i].classes==information[i+j].classes)
	 		{con++;
			 }
			 else
			 {
			 break;
			 }
		 }
			 
		 if(con)//有人是同班同学，在此内排序 
		 {
			for(int m=i;m<=i+con;m++)
			{
				if(m==i)
				{
					printf("%d ",information[i].classes);
				}
				else
				{
					printf("   ");
				}	
				printf("%d ",information[m].ID);
				for(int n=0;information[m].name[n]!='\0';n++)
				{
					printf("%c",information[m].name[n]);
				}
				printf(" %.1f %.1f %.1f ",information[m].math_grade,\
				information[m].physics_grade,information[m].English_grade);
				out_modified(information,delete_student,m);
			}
		 }
		 else
		 {
		 	output(information,i);
		 	out_modified(information,delete_student,i);
		}	 
		 i=i+con;
	  } 
	
}