学生管理系统（大数据实验室）

利用链表实现学生管理系统的增删改查

#define _CRT_SECURE_NO_WARNINGS
#include
#include
#include
struct student
{
	char name[50];
	char sex[10];
	int num;
	int score;
	struct student* next;
};
void manu()
{
	printf("--------------------------------------------------------------n");
	printf("|                       学生管理系统                         |n");
	printf("|-------------------------------------------------------------n");
	printf("|  1.导入学生信息                                            |n");
	printf("|  2.查找学生信息                                            |n");
	printf("|  3.修改学生信息                                            |n");
	printf("|  4.删除学生信息                                            |n");
	printf("|  5.打印学生信息                                            |n");
	printf("|  6.增加学生信息                                            |n");
	printf("|  7.结束并退出                                              |n");
	printf("--------------------------------------------------------------n");
}
struct student* creat()
{
	int i=0;
	struct student* head = NULL;
	struct student* next = NULL;
	struct student* end = next = (struct student*)malloc(sizeof(struct student));
	printf("请输入学生的姓名、性别、学号、成绩：n");
	printf("若想结束录入，请输入endn");
	scanf("%s", next->name);
	scanf("%s", next->sex);
	scanf("%d", &next->num);
	scanf("%d", &next->score);
	i++;
	while (strcmp(next->name, "end") == 1)
	{
		if (i == 1)
		{
			next->next = NULL;
			end = next;
			head = end;
		}
		else
		{
			next->next = NULL;
			end->next = next;
			end = next;
		}
		next = (struct student*)malloc(sizeof(struct student));
		scanf("%s", next->name);
		if (strcmp(next->name, "end") == 0)
		{
			break;
		}
		scanf("%s", next->sex);
		scanf("%d", &next->num);
		scanf("%d", &next->score);
		i++;
	}
	return head;
}
void print(struct student*head)
{
	struct student* n = head;
	while (n->next != NULL)
	{
		printf("姓名：%sn性别：%sn学号：%dn成绩：%dn", n->name, n->sex,n->num, n->score);
		n = n->next;
	}
	printf("姓名：%sn性别：%sn学号：%dn成绩：%dn", n->name, n->sex, n->num, n->score);
}
void find(struct student* head)
{
	struct student* n = head;
	int flag=1;
	char name[15];
	printf("请输入学生姓名：");
	scanf("%s", &name);
	while (n->next != NULL)
	{
		if (strcmp(name, n->name) == 0)
		{
			printf("姓名：%sn性别：%sn学号：%dn成绩：%dn", n->name, n->sex, n->num, n->score);
			flag = 0;
		}
		n = n->next;
	}
	if (strcmp(name, n->name) == 0)
	{
		printf("姓名：%sn性别：%sn学号：%dn成绩：%dn", n->name, n->sex, n->num, n->score);
		flag = 0;
	}
	if (flag == 1)
	{
		printf("-1n");
	}
}
void change(struct student*head)
{
	struct student* n = head;
	printf("请输入学生姓名：n");
	char name[20];
	scanf("%s", &name);
	int t,flag=0;
	char fun[20];
	while (n->next != NULL)
	{
		if (strcmp(name, n->name) == 0)
		{
			flag = 1;
			break;
		}
		n = n->next;
	}
	char function[20];
	if (strcmp(name, n->name) == 0)
	{
		printf("请输入要修改的部分：(name/sex/num/sore)n");
		scanf("%s", function);
		if (strcmp(function, "name") == 0)
		{
			scanf("%s", n->name);
		}
		if (strcmp(function, "sex") == 0)
		{
			scanf("%s", n->sex);
		}
		if (strcmp(function, "num") == 0)
		{
			scanf("%d", &n->num);
		}
		if (strcmp(function, "sore") == 0)
		{
			scanf("%d", &n->score);
		}
		flag = 1;
	}
	if (flag == 0)
	{
		printf("error");
	}
}
struct student* del(struct student* head)
{
	char name[15];
	printf("请输入需要删除的学生姓名：n");
	scanf("%s", &name);
	struct student* n = head;
	int k=0; 
	struct student* t = NULL;
	while (n->next != NULL)
	{
		if (strcmp(name, n->next->name) == 0)
		{
			t = n->next;
			n->next = n->next->next;
			free(t);
			break;
		}
		else if (strcmp(name, head->name) == 0)
		{
			t = n;
			head = n->next;
			free(t);
			break;
		}
		n = n->next;
	}
	if (strcmp(name, n->name) == 0)
	{
		k++;
		t = n;
		n = n->next;
		free(t);
	}
	return head;
}
struct student* add(struct student* head)
{
	struct student* n = head;
	struct student* New = (struct student*)malloc(sizeof(struct student));
	printf("请输入要加入的学生信息：");
	scanf("%s", New->name);
	scanf("%s", New->sex);
	scanf("%d", &New->num);
	scanf("%d", &New->score);
	while (n->next != NULL)
	{
		n = n->next;
	}
	n->next = New;
	New->next = NULL;
	return head;
}
int main()
{
	manu();
	int n = 0;
	struct student* head = NULL;
	printf("请输入你的指令 ：n");
	while (scanf("%d", &n) != EOF)
	{
		if (n == 1)
		{
			head = creat();
		}
		if (n == 2)
		{
			find(head);
		}
		if (n == 3)
		{
			change(head);
		}
		if (n == 4)
		{
			head=del(head);
		}
		if (n == 5)
		{
			print(head);
		}
		if (n == 6)
		{
			head=add(head);
		}
		if (n == 7)
		{
			break;
		}
		printf("请输入你的指令 ：n");
	}
}