大一新生，学生管理系统

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/* 
1。界面
2.数据结构设计
3。交互
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>

//结构体保存管理员信息 
struct guanli
 {
 	char gname[15];
 	char gid[15];
 	char tel[10];
 };
 //结构体保存学生信息 
struct student
{
	char id[15]; 
	char name[10];
    char specialty[10];
	char sex[5];
};

//结点 
struct Node
{
	struct student date;
	struct Node *next;
};

//创建头结点 
struct Node *createList() 
{
	struct Node *headNode = (struct Node *)malloc(sizeof(struct Node));
	headNode->next = NULL;
	return headNode;
}

//创建结点 
struct Node *createNode(struct student date) 
{
	struct Node *newNode = (struct Node *)malloc(sizeof(struct Node));
	newNode->date = date;
	newNode->next = NULL;
	return newNode;
}

//不同功能使用函数完成

//插入结点 
//1录入学生信息 
void insertNodeByHead(struct Node *headNode, struct student date)
{
	struct Node *newNode = createNode(date);
	newNode->next = headNode->next;
	headNode->next = newNode;
}

//2打印全部学生信息 
void printList(struct Node *headNode)
{
	struct Node *pMove = headNode->next;
	printf("学号\t\t姓名\t专业\t性别\n");
	 while(pMove)
	 {
	 	printf("%s\t%s\t%s\t%s\n",pMove->date.id,pMove->date.name,
		 pMove->date.specialty,pMove->date.sex);
	 	pMove = pMove->next;
	} 
	printf("\n"); 
}

//3根据学号搜索学生信息 
struct Node *searchInfoByDate(struct Node *headNode, char *id)
{
	struct Node *pMove = headNode->next;
	while(pMove != NULL)
	{
		if(strcmp(pMove->date.id,id) == 0)
		{
			return pMove;
		}
		else
		{
			pMove = pMove->next;
		}
	}
	return pMove;
}

//4根据学号修改学生信息 
struct Node *amend(struct Node *headNode,char *id)
{

	struct Node *pMove = headNode->next;
	while( pMove != NULL)
	{
		if(strcmp(pMove->date.id,id)==0) 
		break; 
	    else
	    pMove = pMove->next;
	}
	if(pMove!=NULL)
	{
		printf("请输入修改后的信息：\n");
	    printf("请输入学生信息：\n学号\t\t姓名\t专业\t性别:\n");
		fflush(stdin);
		scanf("%s %s %s %s",pMove->date.id,pMove->date.name,
		 pMove->date.specialty,pMove->date.sex);
	}
	else
	{
		printf("没有找到该学生信息！请重新输入！\n");
	}
}

//5根据学号指定删除学生信息
void deleteNode(struct Node *headNode, char *id) 
{
	struct Node *posNode = headNode->next;
	struct Node *posFrontNode = headNode;
	if(posNode == NULL)
	{
		printf("数据为空，无法删除！\n");
		return ;
	}
	while(strcmp(posNode->date.id,id) != 0)
	{
		posFrontNode = posNode;
		posNode = posNode->next;
		if(posNode == NULL)
		{
			printf("没有该名学生，请重新输入！\n");
			return ;
		}
    }
	posFrontNode->next = posNode->next;
	printf("该名学生信息已经被删除！");
	free(posNode);
}

//5删除全部学生信息 
int deleteall(struct Node *headNode) 
{
	printf("你确定需要删除全部学生信息吗？确定请输入1返回请输入0\n"); 
	int q;
	scanf("%d",&q);
	if(q)
	{
	struct Node *posNode = headNode->next;
	while(posNode)
	{
			posNode = posNode->next;
	}
	headNode->next = posNode;
	printf("已经删除全部学生信息！"); 
    } 
    
}

//6按照专业进行分类 
void fenlei(struct Node *headNode,char *specialty)
{
    struct Node *pMove = headNode->next;
    printf("学号\t\t姓名\t专业\t性别\n");
    int k = 1;
	while(pMove)
	{
		if(strcmp(pMove->date.specialty,specialty) == 0)
		{
			printf("%s\t%s\t%s\t%s\n",pMove->date.id,pMove->date.name,
		    pMove->date.specialty,pMove->date.sex);
		    k = 0;
		}
		pMove = pMove->next;
	}
	if(k == 1)
		{
			printf("系统里没有储存该专业学生信息。\n");
		} 
}

//7按照性别进行分类
void fenleibysex(struct Node *headNode,char *sex)
{
    struct Node *pMove = headNode->next;
    printf("学号\t\t姓名\t专业\t性别\n");
    int k = 1;
	while(pMove)
	{
		if(strcmp(pMove->date.sex,sex) == 0)
		{
			printf("%s\t%s\t%s\t%s\n",pMove->date.id,pMove->date.name,
		    pMove->date.specialty,pMove->date.sex);
		    k = 0;
		}
		pMove = pMove->next;
	}
	if(k)
	{
		printf("系统里没有储存该性别学生信息。\n");
	}
}

//8按照学号从小到大排序 
void BubbleSortByName(struct Node *headNode)
{
	
	for (struct Node* p = headNode->next; p != NULL; p = p->next)
	{
		for (struct Node* q = headNode->next; q->next != NULL; q = q->next)
		{
			if (strcmp(q->date.id, q->next->date.id)>0)
			{
				struct student tempData = q->date;
				q->date = q->next->date;
				q->next->date = tempData;
			}
		}
	}
	printList(headNode);
}

//输入密码登陆 
int password()
{
	char gname[]={"辜果"};
	char gid[]={"202031061014"};
	char name[10];
	char id[20];
	struct guanli number[10];
	FILE* fp = fopen("E:\\管理.txt", "r");  
	if (fp == NULL) 
	{	
		fp = fopen("E:\\管理.txt", "w+");
	}
	int i = 0;
	while (fscanf(fp, "%s %s\n", number[i].gname,number[i].gid) != EOF)
	{
		i++;
	}
	fclose(fp);
	int n = 3;
	while(n)
	{
		printf("您还有%d次机会登陆\n",n);
		printf("请输入姓名和密码值！（备注：初始姓名和密码是最帅气的那一位）\n");
		scanf("%s %s",name,id);
		if((strcmp(gname,name)==0)&&(strcmp(gid,id)==0))
		{
			printf("登陆成功！加油奥力给！\n");
	        return 1;		
		}
		int k = 0;
		while(k<i)
		{
		 	if((strcmp(number[k].gname,name)==0)&&(strcmp(number[k].gid,id)==0))
		 	{
		 		printf("登陆成功！加油奥力给！\n");
		 		return 1;
		    }
		    else
		 	k++;
		}
		n--;
	}
	if(n == 0)
	printf("密码错误三次！正常退出系统！");
	exit(0);
}

//注册管理员信息 
int sign_in ()
{
	char gname[]={"辜果"};
	char gid[]={"202031061014"};
	char name[10];
	char id[20];
	struct guanli number;
	struct guanli tnumber[10];
    FILE *fp = fopen("E:\\管理.txt","r");
	if(fp == NULL)
	{
		fp = fopen("E:\\管理.txt","w+");
	}
	int i = 0;
	while (fscanf(fp, "%s %s %s\n", tnumber[i].gname,tnumber[i].gid,tnumber[i].tel) != EOF)
	{
		i++;
	}
	fclose(fp);
	fp = fopen("E:\\管理.txt", "a");
	printf("最多可以新添10位管理员信息。(现在已新添%d名管理)\n",i); 
	printf("请输入初始姓名和密码！\n");
	scanf("%s %s",name,id);
	if((strcmp(gname,name)==0)&&(strcmp(gid,id)==0)) 
	{
		printf("输入需要注册的姓名密码和号码：\n");
		scanf("%s %s %s",number.gname,number.gid,number.tel); 
		fprintf(fp,"%s %s %s\n",number.gname,number.gid,number.tel);
		fclose(fp);
		printf("注册完成！重新登陆！\n");
		return -1;
    }
    else
    {
      	printf("初始密码错误！请重新输入！");
      	return -1;
	}
}

//管理员信息查看
void information()
{
	struct guanli number[10];
	FILE* fp = fopen("E:\\管理.txt", "r");  
	if (fp == NULL) 
	{	
		fp = fopen("E:\\管理.txt", "w+");
	}
	int i = 0;
	while (fscanf(fp, "%s %s %s\n", number[i].gname,number[i].gid,number[i].tel) != EOF)
	{
		i++;
	}
	i--;
	fclose(fp);
	while(i>=0)
	{
		printf("%s %s\n",number[i].gname,number[i].tel);
		i--;
	}
} 

//管理员登陆界面 
int  login()
{
	
	printf("\t\t\t\t\t╭╮ ＿＿＼｜／＿＿╭╮\n");
	printf("\t\t\t\t\t│　　　~│　　　　   |\n");
	printf("\t\t\t\t\t│　≥　╭———╮　≤│ 　　 \n");
	printf("\t\t\t\t\t│／／  │0　0  │／／│\n ");
	printf("\t\t\t\t\t│　　  ╰—— —   　│\n");
	printf("\t\t\t\t\t╰——┬O————┬—O╯\n");
	printf("\t\t\t\t\t●│　　　　│ \n");
	printf("\t\t\t\t\t╰│　　O　 │ \n");
	printf("\t\t\t\t\t╰｜｜-｜｜╯\n");
	printf("\n\n"); 
	printf("\t\t\t-------------亲爱的管理员你好啊m( =. ω.= )m-----------\n"); 
	printf("\n"); 
	printf("\t\t\t--------------   今天也要元气满满哟    ---------------\n"); 
	printf("\n");
	printf("\n");
	printf("\t\t\t\t\t 管理登陆请输入(1)\n\t\t\t\t\t 管理注册请输入(2)\n\t\t\t\t\t 任意输入其他值退出\n");
	int i;
	scanf("%d",&i);
	if(i == 1)
	{	
	    password();
	}
	else if(i == 2)
	{
	    sign_in();
	}
	else
	{
		printf("正常退出！"); 
		exit(0);
	}
		
}

	
//界面 
void menu()
{
	printf("            ☆☆☆  ∧＿∧  ☆☆ ☆\n");
	
	printf("---------------{学生管理系统}-----------\n\n");
	printf("                 0.退出系统             \n\n");
	printf("                 1.录入信息             \n\n");
	printf("                 2.浏览信息             \n\n");
	printf("                 3.查找信息             \n\n");
	printf("                 4.修改信息             \n\n");
	printf("                 5.删除信息             \n\n");
	printf("                 6.按照专业分类         \n\n");
	printf("                 7.按照性别分类         \n\n");
	printf("                 8.按照学号排序从小到大 \n\n");
    printf("                 9.查看管理员信息       \n\n");
    printf("         每次进行一次输入后使用空格隔开\n");
	printf("---------------{学生管理系统}-----------\n");
	
}

//创建一个头结点，便于后面操作 
struct Node *list = createList(); 
//链表与文件的读入信息和读出信息 
//文件写操作 
void saveInfoToFile(const char* fileName, struct Node* headNode) 
{
	FILE *fp = fopen(fileName, "w");
	struct Node* pMove = headNode->next;
	while (pMove != NULL) 
	{
		fprintf(fp, "%s\t%s\t%s\t%s\n", pMove->date.id, pMove->date.name, 
		pMove->date.specialty,pMove->date.sex);
		pMove = pMove->next;
	}
	fclose(fp);
}

//文件读操作
void readInfoFromFile(const char* fileName, struct Node* headNode) 
{
	FILE* fp = fopen(fileName, "r");  //第一次打开文件肯定不存在
	if (fp == NULL) 
	{	
		fp = fopen(fileName, "w+");//不存在就创建出来这个文件
	}
	struct student tempData;
	while (fscanf(fp, "%s\t%s\t%s\t%s\n", tempData.id,tempData.name,
	 tempData.specialty,tempData.sex) != EOF) 
	{
		insertNodeByHead(list, tempData);
	}
	fclose(fp);
}

//根据菜单项，做相应的事情
void keyDown()
{
	
	int choice ;
	struct student date;
	struct Node *pMove = NULL;
	scanf("%d",&choice);
	switch(choice)
	{
		
		case 0:
			system("color 75");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("正常退出！\n");
			system("pause");
			exit(0);
		break;
		
		case 1:
			system("color 72");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("----------录入信息---------\n"); 
		    printf("请输入需要添加信息的学生人数：");
            int n;
            scanf("%d",&n);
            printf("\n");
            printf("请输入学生信息：\n学号\t\t姓名\t专业\t性别:\n");
            
            for(int i = 1;i<=n;i++)
           {
	            fflush(stdin);
	            scanf("%s%s%s%s",date.id,date.name,
		        date.specialty,date.sex);
	            insertNodeByHead(list,date);
	            saveInfoToFile("student.txt", list);
            }
	    break;
	    
		case 2:
			system("color 74");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("----------浏览信息---------\n");
			printf("浏览学生信息：\n");
			printList(list);
		break;
		
		case 3:
			system("color 73");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("----------查找信息---------\n");
			printf("请输入需要查找的的学生学号：\n");
			scanf("%s",date.id);
			pMove = searchInfoByDate(list,date.id);
			if(pMove==NULL) 
			{
				printf("未找到该学生\n");
				//system("pause");
			}
			else
			{
				printf("学号\t\t姓名\t专业\t性别:\n");
				printf("%s\t%s\t%s\t%s\n",pMove->date.id,pMove->date.name,
		 pMove->date.specialty,pMove->date.sex);
			}
		break;
		
		case 4:
			system("color 7A");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("----------修改信息---------\n");
			printf("请输入需要修改的学生学号：\n");
			scanf("%s",date.id);
			amend(list,date.id);
		    saveInfoToFile("student.txt", list);
		break;
		
		case 5:
			system("color 74");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("----------删除信息---------\n");
			printf("\t1.指定删除 。   \t2.全部删除。");
			printf("\n");
            int j;
            scanf("%d",&j);
            if(j == 1)
            {
	        printf("请输入需要删除的学生学号：\n");
			scanf("%s",date.id);
			deleteNode(list,date.id);
	        saveInfoToFile("student.txt", list);
           } 
            else if(j == 2)
          {
	         deleteall(list);
	         saveInfoToFile("student.txt", list);
          }
           else
          {
	      printf("你输错了，请重新输入！"); 
          } 
		break;
		
		case 6:
			system("color 79");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
		    printf("请输入需要查看的专业：");
			scanf("%s",date.specialty);
			fenlei(list,date.specialty);
		break;
		 
		case 7:
			system("color 79");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
		    printf("请输入需要查看的性别：");
			scanf("%s",date.sex);
			fenleibysex(list,date.sex);
		break;
		
		case 8:
			system("color 76");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("按照学号排序：\n");
			BubbleSortByName(list);
		break;
		
		case 9:
		    system("color 7");
			printf("☆☆☆  ∧＿∧  ☆☆ ☆\n");
			printf("查看管理员信息：\n");
			information(); 
			printf("遇到困难可以联系以上管理员！");
			break;
			
		default:
			printf("输入错误，请重新输入!\n");
		break;
	} 
 } 

//主函数 
int main()
{
	system("color 30");
	readInfoFromFile("student.txt", list);
	
		while(1)
		{
	        int k = login(); 
			while(k == 1)
			{
			system("pause");
		    system("cls"); 
			    while(1)
			    {
				printf("\## 标题t请进行你的操作！(只能输入0-8哟)\n"); 
				menu();
				keyDown();
				system("pause");
				system("cls"); 
			    }
		    }
		    system("pause");
			system("cls"); 
  	   }
   
}