基于链表的学生成绩管理系统

基于链表的学生成绩管理系统，包括了学生基本信息的增删改查功能，背后是用链表来实现，也可以理解为带头结点的链表的增删改查。

可以作为实践练手的小项目，也可以当做链表初学者的一个小课程设计。

效果图：

 源码如下：

studentSystem.cpp

#include "myList.h"

struct Node* infoNode = createList();

//菜单
void menu()
{
	printf("-----------【学生成绩管理系统】-------------\n");
	printf("\t\t0.退出系统\n");
	printf("\t\t1.录入信息\n");
	printf("\t\t2.浏览信息\n");
	printf("\t\t3.修改信息\n");
	printf("\t\t4.删除信息\n");
	printf("\t\t5.查找信息\n");
	printf("--------------------------------------------\n");
}

//用户选择事件
void keyDown()
{
	int choose;
	char name[20] = { 0 };
	scanf("%d",&choose);
	struct student tmp;
	struct Node* tmpNode = NULL;
	switch (choose)
	{
	case 0:
		system("pause");
		exit(0);
		break;
	case 1:
		printf("------------------【录入信息】---------------\n");
		printf("请输入学生姓名，年龄，性别，成绩\n");
		scanf("%s%d%s%d",&tmp.name,&tmp.age,&tmp.sex,&tmp.grade);
		insertNodeByHead(infoNode,tmp);
		break;
	case 2:
		printf("------------------【浏览信息】---------------\n");
		printList(infoNode);
		break;
	case 3:
		printf("------------------【修改信息】---------------\n");
		printf("请输入需要修改的学生名字：\n");
		scanf("%s",&name);
		tmpNode = searchInfoByData(infoNode, name);
		if (tmpNode != NULL)
		{
			printf("请输入学生姓名，年龄，性别，成绩\n");
			scanf("%s%d%s%d", &tmp.name, &tmp.age, &tmp.sex, &tmp.grade);
			modifyInfoByData(infoNode,name,tmp);
		}
		break;
	case 4:
		printf("------------------【删除信息】---------------\n");
		printf("请输入需要删除的学生名字：\n");
		scanf("%s", &name);
		deleteAppoinNode(infoNode,name);
		break;
	case 5:
		printf("------------------【查找信息】---------------\n");
		printf("请输入需要查找的学生名字：\n");
		scanf("%s", &name);
		tmpNode = searchInfoByData(infoNode, name);
		if (tmpNode != NULL)
		{
			printf("name\tage\tsex\tgrade\n");
			printf("%s\t%d\t%s\t%d\n", tmpNode->data.name, tmpNode->data.age, tmpNode->data.sex, tmpNode->data.grade);
		}
		break;
	default:
		printf("输入错误，请重新输入！\n");
		system("pause");
		break;
	}
}

int main()
{
	while (1)
	{
		menu();
		keyDown();
		system("pause");
		system("cls");
	}
	system("pause");
	return 0;
}

myList.h

#pragma once
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct student
{
	char name[20];
	int age;
	char sex[5];
	int grade;
};

struct Node
{
	student data;
	struct Node*next;
};

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

//创建节点
struct Node* createNode(student data)
{
	struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
	newNode->data = data;
	newNode->next = NULL;
	return newNode;
}

//插入链表(头插法)
void insertNodeByHead(struct Node* headNode, student data)
{
	struct Node* newNode = createNode(data);
	newNode->next = headNode->next;
	headNode->next = newNode;
}

//删除结点(根据name进行删除)
void deleteAppoinNode(struct Node* headNode, char* name)
{
	struct Node* nowNode = headNode->next;
	struct Node* nowNodeFront = headNode;

	if (nowNode == NULL)
	{
		printf("数据为空，无法删除！\n");
		return;
	}

	while (strcmp(nowNode->data.name, name))
	{
		nowNodeFront = nowNode;
		nowNode = nowNode->next;
		if (nowNode == NULL)
		{
			printf("未找到指定数据!\n");
			return;
		}
	}

	//找到了指定数据,进行删除
	nowNodeFront->next = nowNode->next;
	free(nowNode);
	printf("删除成功!\n");
}

//查找节点(根据名字查找)
struct Node* searchInfoByData(struct Node* headNode, char *name)
{
	struct Node* tmp = headNode->next;
	if (tmp ==NULL)
	{
		printf("无数据！\n");
		return NULL;
	}

	while (strcmp(tmp->data.name, name))
	{
		tmp = tmp->next;
		if (tmp == NULL)
		{
			printf("无此人！\n");
			return NULL;
		}
	}
	//找到，返回当前结点
	return tmp;
}

//修改结点
void modifyInfoByData(struct Node* headNode, char* name_before, student data_after)
{
	char* name = name_before;
	struct Node* tmp = searchInfoByData(headNode, name);
	tmp->data = data_after;
}

//打印链表
void printList(struct Node* headNode)
{
	struct Node* tmp = headNode->next;
	printf("name\tage\tsex\tgrade\n");
	while (tmp)
	{
		printf("%s\t%d\t%s\t%d\n",tmp->data.name,tmp->data.age,tmp->data.sex,tmp->data.grade);
		tmp = tmp->next;
	}
	printf("\n");
}

欢迎建议改进

转载请注明出处，谢谢！

By  Lalmon