本程序若运行失败请关闭重试，若再次失败可以自行先建立一个文件夹   “D:\\000\\studentInfo.txt”

 

边学链表，结构体，指针边做的程序，加起来学做了48小时，所以肯定存在很多不足，这是第二版，请多包含。

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>//2020 12 14--8:16完工
#include<conio.h>//指针，结构，链表，文件操作，封装
#include<time.h>
#include<windows.h>

void menu(struct Node* link , struct student asd);//菜单栏
struct student;
struct Node;
struct Node* creatLink();//创建链表（表头）
struct Node* creatNode(struct student data);//创建节点
void insetNodeByHead(struct Node* headNode, struct student data);//增加
void debeateNode(struct Node* headNode, char name[20]);//删除
void searchNode(struct Node* headNode, char name[20]);//查询
void changeNode(struct Node* headNode, char name[20]);//修改
void printLink(struct Node* headNode);//打印链表
void inset(struct Node* link , struct student asd);//具体增加函数
void debeate(struct Node* link , struct student asd);//具体删除函数
void search(struct Node* link , struct student asd);//具体查询函数
void change(struct Node* link , struct student asd);//具体修改函数
void look(struct Node* link , struct student asd);//具体浏览函数
void readInfoFromFile(struct Node* headNode, const char* readFile);//读出文件
void writeInfoFromFile(struct Node* headNode, const char* writeFile);//写入文件
struct student
{
	char name[20] = { '0' };
	char sex[5] = { '0' };
	int age = 0;
	char tel[20] = { '0' };
};
void menu(struct Node* link,struct student asd)
{
	
	int cho;
	printf("\n\n\t\t============[学生信息管理系统]============\n\n");
	printf("\t\t              1.增加学生信息\n\t\t              2.删除学生信息\n");
	printf("\t\t              3.修改学生信息\n\t\t              4.搜索学生信息\n");
	printf("\t\t              5.查看信息总表\n\t\t              6.退出管理系统\n\n");
	printf("\t\t==========================================\n\n");
	printf("\t\t============[请您选择服务项目]============\n\n");
	printf("\t\t                     ");
	scanf_s("%d", &cho);
	switch (cho)
	{
	case 1:
		inset(link, asd);
		break;
	case 2:
		debeate(link, asd);
		break;
	case 3:
		change(link, asd);
		break;
	case 4:
		search(link, asd);
		break;
	case 5:
		look(link, asd);
		break;
	case 6:
		exit(0);
	default:
		exit(0);
	}
}
struct Node
{
	struct student data;
	struct Node* next;
};
struct Node* creatLink()//创建链表（表头）
{
	struct Node* headNode = (struct Node*)malloc(sizeof(struct Node));
	headNode->next = NULL;
	return headNode;
}
struct Node* creatNode(struct student data)//创建节点
{
	struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
	newNode->next = NULL;
	newNode->data = data;
	return newNode;
}
void insetNodeByHead(struct Node* headNode, struct student data)//增加
{
	struct Node* newNode = creatNode(data);
	newNode->next = headNode->next;
	headNode->next = newNode;
}
void debeateNode(struct Node* headNode,char name[20])//删除
{
	struct Node* pMove = headNode->next;
	struct Node* pFrontMove = headNode;
	if (pMove == NULL)
	{
		printf("\t\t无\n");
		Sleep(5000);
		system("cls");
		menu(headNode, headNode->data);
	}
	else
	{
		while (strcmp(pMove->data.name,name))
		{
			pFrontMove = pMove;
			pMove = pMove->next;
			if (pMove == NULL)
			{
				printf("\t\t无\n");
				Sleep(5000);
				system("cls");
				menu(headNode, headNode->data);
			}
		}
		pFrontMove->next = pMove->next;
		free(pMove);
	}
}
void changeNode(struct Node* headNode, char name[20])//修改
{
	struct Node* pMove = headNode->next;
	if (pMove == NULL)
	{
		printf("\t\t无\n");
		Sleep(5000);
		system("cls");
		menu(headNode, headNode->data);
	}
	else
	{
		while (strcmp(pMove->data.name, name))
		{
			pMove = pMove->next;
			if (pMove == NULL)
			{
				printf("\t\t无\n");
				Sleep(5000);
				system("cls");
				menu(headNode, headNode->data);
			}
		}
		printf("\t\t请输入学生的  姓名  性别  年龄  电话号码(请勿使用中文)\n\t\t");
		scanf_s("%s %s %d %s", pMove->data.name, sizeof(pMove->data.name), pMove->data.sex, sizeof(pMove->data.sex), &pMove->data.age, pMove->data.tel, sizeof(pMove->data.tel));
	}
}
void searchNode(struct Node* headNode, char name[20])//查询
{
	struct Node* pMove = headNode->next;
	if (pMove == NULL)
	{
		printf("\t\t无\n");
		Sleep(5000);
		system("cls");
		menu(headNode, headNode->data);
	}
	else
	{
		while (strcmp(pMove->data.name, name))//strcmp是比较大小的函数，二者相同则为0，0表示否定，循环结束。
		{
			pMove = pMove->next;
			if (pMove == NULL)
			{
				printf("\t\t无\n");
				Sleep(5000);
				system("cls");
				menu(headNode, headNode->data);
			}
		}
		system("cls");
		printf("\t姓名\t\t性别\t\t年龄\t\t电话号码\n");
		setbuf(stdin, NULL);
		printf("\t%s\t\t%s\t\t%d\t\t%s\n", pMove->data.name,pMove->data.sex,pMove->data.age,pMove->data.tel);
		setbuf(stdin, NULL);
		
	}
}
void printLink(struct Node* headNode)//打印链表
{
	struct Node* pMove = headNode->next;
	printf("\t姓名\t\t性别\t\t年龄\t\t电话号码\n");
	while (pMove != NULL)
	{
		if (strcmp(pMove->data.name, "Age") == 0)
		{
			return;
		}
		printf("\t%s\t\t%s\t\t%d\t\t%s\n", pMove->data.name, pMove->data.sex, pMove->data.age, pMove->data.tel);
		pMove = pMove->next;
	}
	
}
void inset(struct Node* link , struct student asd)
{
	system("cls");
	while (1)
	{
		system("cls");
		printf("\t\t请输入学生的  姓名  性别  年龄  电话号码(请勿使用中文)\n\t\t");
		setbuf(stdin, NULL);
		scanf_s("%s %s %d %s", asd.name, sizeof(asd.name), asd.sex, sizeof(asd.sex), &asd.age, asd.tel, sizeof(asd.tel));
		insetNodeByHead(link, asd);
		printf("\t\t是否继续(Y/N)?\n\t\t");
		setbuf(stdin, NULL);
		int a = getchar();
		if (a == 'n' || a == 'N')
		{
			system("cls");
			printLink(link);
			printf("\n\t\t输入s返回主页面\n\t\t");
			setbuf(stdin, NULL);
			int b = getchar();
			if (b == 's' || b == 'S')
			{
				writeInfoFromFile(link, "D:\\000\\studentInfo.txt");
				system("cls");
				menu(link, asd);
			}
			else
			{
				continue;
			}
		}
	}
}
void debeate(struct Node* link, struct student asd)
{
	system("cls");
	printLink(link);
	printf("\t\t请输入您要删除的学生的姓名\n\t\t");
	setbuf(stdin, NULL);
	scanf_s("%s", asd.name, sizeof(asd.name));
	debeateNode(link, asd.name);
	writeInfoFromFile(link, "D:\\000\\studentInfo.txt");
	system("cls");
	menu(link, asd);
}
void search(struct Node* link, struct student asd)
{
	system("cls");
	printLink(link);
	printf("\t\t请输入您要查找的学生姓名\n\t\t");
	setbuf(stdin, NULL);
	scanf_s("%s", asd.name, sizeof(asd.name));
	searchNode(link, asd.name);
	printf("\n\t\t输入任何数返回主页面\n\t\t");
	setbuf(stdin, NULL);
	int b = getchar();
	if (b != 99999999999999999)
	{
		system("cls");
		menu(link, asd);
	}
	else
	{
		exit(0);
	}
}
void change(struct Node* link, struct student asd)
{
	system("cls");
	printLink(link);
	printf("\t\t请输入您想要修改的学生的姓名\n\t\t");
	setbuf(stdin, NULL);
	scanf_s("%s", asd.name, sizeof(asd.name));
	changeNode(link, asd.name);
	writeInfoFromFile(link, "D:\\000\\studentInfo.txt");
	system("cls");
	menu(link, asd);
}
void look(struct Node* link, struct student asd)
{
	system("cls");
	printLink(link);
	printf("\t\t输入任何数返回主页面\n\t\t");
	setbuf(stdin, NULL);
	int a = getchar();
	if (a != 99999999999999999)
	{
		system("cls");
		menu(link, asd);
	}
	else
	{
		exit(0);
	}
}
void readInfoFromFile(struct Node* headNode, const char* readFile)
{
	FILE* fp = fopen(readFile, "r");
	struct student asd;
	if (fp == NULL)
	{
		fopen(readFile, "w+");
	}
	while (fscanf_s(fp, "%s %s %d %s", asd.name, sizeof(asd.name), asd.sex, sizeof(asd.sex), &asd.age, asd.tel, sizeof(asd.tel)) != EOF)
	{
		insetNodeByHead(headNode, asd);
	}
	fclose(fp);
}
void writeInfoFromFile(struct Node* headNode, const char* writeFile)
{
	FILE* fp;
	struct Node* pMove = headNode->next;
	fp = fopen(writeFile, "w");
	fprintf(fp, "\tName\t\tSex\t\tAge\t\tTel\t\t\n");
	while (pMove != NULL)
	{
		fprintf(fp, "\t%s\t\t%s\t\t%d\t\t%s\t\t\n", pMove->data.name, pMove->data.sex,  pMove->data.age, pMove->data.tel);
		pMove = pMove->next;
	}
	fclose(fp);
}
int main()
{
	struct student asd;
	struct Node* link = creatLink();
	readInfoFromFile(link, "D:\\000\\studentInfo.txt");
	menu( link , asd);
	system("pause");
	return 0;
}