私のC/C++の道-010課(構造体使用の簡単な例(学生成績管理))

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
/**
	          :
	1.         （    ,  ,  ,  ,    ）
	           (          ,          )

	2.        ,  ,  ,  
*/
typedef struct Student
{
	char no[4];//3     ,       
	char name[10];
	int chinese;
	int math;
	int english;
	struct Student *next;//       

}StudentList;
void init(StudentList *&);
void select(StudentList *);    //    
void insert(StudentList *&);   //    
void update(StudentList *&);   //    
void deleteData(StudentList *);//    

void studentScoreManege()
{
	StudentList *stuList = NULL;
	int oprate;
	init(stuList);//   
	do{
		system("cls");
		fflush(stdin);
		puts("************* Student Data Oprate *******************");
		puts("*    1. select student score                        *");
		puts("*    2. insert student score                        *");
		puts("*    3. update student score                        *");
		puts("*    4. delete student data                         *");//      ,         ,        
		puts("*    0. exit                                        *");
		puts("*****************************************************");
		printf("please select a number: ");
		
		scanf("%d",&oprate);
		switch(oprate)//            
		{
		case 1:
			select(stuList);
			break;
		case 2:
			insert(stuList);
			break;
		case 3:
			update(stuList);
			break;
		case 4:
			deleteData(stuList);
			break;
		case 0:
		default:
			break;
		}
	}while(oprate!=0);
}
//     
void init(StudentList *&stuList)
{
	stuList = (StudentList *)malloc(sizeof(StudentList));
	stuList->next = NULL;
}

//    
void select(StudentList *stuList)
{
	StudentList *p = stuList->next;
	if(p==NULL)
	{
		puts("there is no data,please insert!!");
		puts("press any key to return!!!");
		getchar();
	}
	puts("**************  student score insert *********************");
	puts("No\tName\tChinese\tMath\tEnglish");
	while(p!=NULL)
	{
		printf("%s\t%s\t%d\t%d\t%d
",p->no,p->name,p->chinese,p->math,p->english);
		p = p->next;
	}
	fflush(stdin);
	puts("press any key to return!!!");
	getchar();
}
//    
void insert(StudentList *&stuList)
{
	StudentList *p ,*s;
	p = stuList;
	while(p->next != NULL)
	{
			p = p->next;
	}
	do{
		s = (StudentList *)malloc(sizeof(StudentList));
		
		puts("please insert student data(NO,Name,Chinese,Math,English):");
		scanf("%3s%10s",&s->no,&s->name);
		scanf("%d%d%d",&s->chinese,&s->math,&s->english);
		//       ,               
		if(s->chinese<0||s->chinese>100||s->math<0||s->math>100||s->english<0||s->english>100)
		{
			puts("input data error !!!");
			return;
		}
		s->next = NULL;
		p->next = s;
		p = p->next;//          
		fflush(stdin);//       '
'      getchar()    
		puts("Continue?ENTER to yes or input no to exit");//      
	}while(getchar()=='
');

}
//  
void update(StudentList *&stuList)
{
	StudentList *p = stuList->next;
	char no[4];//3   ,     4~   ,         ,      
	fflush(stdin);//        
	puts("please input student No: ");
	gets(no);
	//           
	if(p==NULL)
	{
		puts("there is no record,please insert!!");
		puts("press any key to return!!!");
		getchar();
		return;
	}
	else
	{
		while(p!=NULL)
		{
			if(!strcmp(p->no,no)){//     ,     
				puts("NO\tNAME\tChinese\tMath\tEnglish");
				printf("%s\t%s\t%d\t%d\t%d
",p->no,p->name,p->chinese,p->math,p->english);
				break;
			}
			else{
				p = p->next;
			}
		}
		if(p==NULL)//   
		{
			puts("can't find this student's record!!!");
			puts("press any key to return!!!");
			getchar();
			return;
		}
	}
	//          ,       
	puts("please update student data(Name,Chinese,Math,English):");
	scanf("%10s",&p->name);
	scanf("%d%d%d",&p->chinese,&p->math,&p->english);
	fflush(stdin);
	puts("update successful,press any key to return!!!");
	getchar();
}
//    
void deleteData(StudentList *stuList)
{
	/*             ,       ,      ,
		   a->b->c,   b，   a->c , free(b),
		    a->next=b->next
	*/
	StudentList *p = stuList,*q;
	char no[4];//3   ,     4~   ,         ,      
	fflush(stdin);//        
	puts("please input student No: ");
	gets(no);
	//           
	if(p->next==NULL)
	{
		puts("there is no record !!!");
		puts("press any key to return!!!");
		getchar();
		return;
	}
	else
	{
		while(p->next!=NULL)
		{
			if(!strcmp(p->next->no,no)){//     ,     
				puts("NO\tNAME\tChinese\tMath\tEnglish");
				printf("%s\t%s\t%d\t%d\t%d
",p->next->no,p->next->name,p->next->chinese,p->next->math,p->next->english);
				break;
			}
			else{
				p = p->next;
			}
		}
		if(p->next==NULL)//   
		{
			puts("can't find this student's record!!!");
			puts("press any key to return!!!");
			getchar();
			return;
		}
	}
	puts("Are you sure delete this record? press ENTER to confirm or other key to cancel!!!");
	if(getchar()=='
')//    ,      ,     GOOGLE OR BAIDU       
	{
		q = p->next;
		p->next = q->next;
		free(q);//    
	}
	puts("delete successful,press any key to return!!!");
	getchar();
}