C++学生管理系统

#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<cstdlib>
#include<cstring>
#include<iomanip>
#include <windows.h>
using std::endl;
using std::cin;
using std::cout;
#define NAMESIZE 20
#define FILENAME "学生成绩.dat"
const char* subject[6] = { "语文","数学","英语","物理","化学","生物" };
class Human {
public:
	char name[NAMESIZE] = { '\0' };
	int age;
	double height;
	double weight;
};
typedef class Student:public Human {
public:
	int info=0;
	int arr[6]={0};
	struct Student* next;
}SN, * SNL;
class stuSystem {
private:
	SNL shead;
public:
	stuSystem();
	int ADD();
	int SORT();
	int SORT(int index);
	int SEARCH();
	int CHANGE();
	int FILEREAD();
	int FILEWRITE();
	int SHOW();
	int MENU();
	int DEL();
	SNL INIT();
	int wait();
	int WrongInput(const char* warn);
	int color(int x);
	int AddScore(const int info, const int arr[6], const char name[NAMESIZE]);
};
int delwar;
int System();

int main(int argc, char** argv)
{
	System();
	return 0;
}
stuSystem::stuSystem() {
	this->shead = INIT();
	for (int i = 0; i < 6; i++)
		this->shead->arr[i] = 0;
	this->shead->info = 0;
	this->shead->next = NULL;
}
int stuSystem::SORT()
{
	SNL shead = this->shead;
	if (!shead || !(shead->next))
	{
		WrongInput("链表头不存在，无法排序");
		return -1;
	}
	else {
		SNL s1, s2;
		s1 = shead->next;
		while (s1)
		{
			s2 = s1->next;
			while (s2)
			{
				int sum1 = 0;
				int sum2 = 0;
				for (int i = 0; i < 6; i++)
				{
					sum1 += s1->arr[i];
					sum2 += s2->arr[i];
				}
				if (sum1 < sum2)
				{
					int temp;
					temp = s1->info;
					s1->info = s2->info;
					s2->info = temp;
					for (int i = 0; i < 6; i++)
					{
						int temp;
						temp = s1->arr[i];
						s1->arr[i] = s2->arr[i];
						s2->arr[i] = temp;
					}
					char name1[NAMESIZE] = { '\0' };
					char name2[NAMESIZE] = { '\0' };
					strcpy(name1, s1->name);
					strcpy(name2, s2->name);
					for (int i = 0; i < NAMESIZE; i++)
					{
						s1->name[i] = s2->name[i] = '\0';
					}
					strcpy(s1->name, name2);
					strcpy(s2->name, name1);
				}
				s2 = s2->next;
			}
			s1 = s1->next;
		}
		cout << endl;
		cout << "\t\t\t\t\t";
		cout << "排序成功";
		cout << endl;
	}
	return 0;
}
int stuSystem::SORT(int index)
{
	SNL shead = this->shead;
	if (!shead || !(shead->next))
	{
		WrongInput("链表头不存在，无法排序");
		return -1;
	}
	else {
		SNL s1, s2;
		s1 = shead->next;
		while (s1)
		{
			s2 = s1->next;

			while (s2)
			{
				if (s1->arr[index-1] < s2->arr[index-1])
				{
					int temp;
					temp = s1->info;
					s1->info = s2->info;
					s2->info = temp;
					for (int i = 0; i < 6; i++)
					{
						int temp;
						temp = s1->arr[i];
						s1->arr[i] = s2->arr[i];
						s2->arr[i] = temp;
					}
					
					char name1[NAMESIZE] = { '\0' };
					char name2[NAMESIZE] = { '\0' };

					strcpy(name1, s1->name);
					strcpy(name2, s2->name);

					for (int i = 0; i < NAMESIZE; i++)
					{
						s1->name[i] = s2->name[i] = '\0';
					}
					strcpy(s1->name, name2);
					strcpy(s2->name, name1);
				}
				s2 = s2->next;
			}
			s1 = s1->next;
		}
		cout << endl;
		cout << "\t\t\t\t\t";
		cout << "排序成功";
		cout << endl;
	}
	return 0;
}
int stuSystem::DEL()
{
	int info;
	SNL shead = this->shead;
	cout << endl << endl << endl;
	cout << "\t\t\t\t\t";
	cout << "输入学号: ";
	cin >> info;
	while (shead->next)
	{
		if (shead->next->info == info)
		{
			SNL delnode = shead->next;
			shead->next = shead->next->next;
			free(delnode);
			cout << endl;
			cout << "\t\t\t\t\t";
			cout<<"删除成功";
			cout << endl;
			return 0;
		}
		shead = shead->next;
	}
	WrongInput("查无此人");
	return 0;
}
int stuSystem::SEARCH()
{
	int info;
	SNL shead = this->shead;
	cout << endl << endl << endl;
	cout << "\t\t\t\t\t";
	cout<<"输入学号: ";
	cin >> info;
	while (shead->next)
	{
		if (shead->next->info == info)
		{


			printf("\n\t\t  %10d%8s%8d%8d%8d%8d%8d%8d",
				shead->next->info, 
				shead->next->name, 
				shead->next->arr[0],
				shead->next->arr[1], 
				shead->next->arr[2], 
				shead->next->arr[3],
				shead->next->arr[4], 
				shead->next->arr[5]);
			cout << endl;
			cout << "\t\t\t\t\t";
			cout << "查询成功";
			cout << endl;
			return 0;
		}
		shead = shead->next;
	}
	WrongInput("查无此人");
	return 0;
}
int stuSystem::CHANGE()
{
	int info;
	SNL shead = this->shead;
	cout << endl << endl << endl;
	cout << "\t\t\t\t\t";
	cout<<"输入学号: ";
	cin >> info;
	while (shead->next)
	{
		if (shead->next->info == info)
		{
			cout << endl;
			cout << endl;
			cout << endl;
			cout << "\t\t\t\t\t";
			cout << "输入姓名: ";
			for (int i = 0; i < NAMESIZE; i++) {
				shead->next->name[i] = '\0';
			}
			cin>>shead->next->name;
			for (int i = 0; i < 6; i++)
			{
				cout << "\t\t\t\t\t";
				cout<<"输入"<<subject[i]<<"成绩: ";
				cin>>shead->next->arr[i];
			}
			cout << endl;
			cout << "\t\t\t\t\t";
			cout<<"修改成功";
			cout << endl;
			return 0;
		}
		shead = shead->next;
	}
	WrongInput("查无此人");
	return 0;
}
int stuSystem::SHOW()
{
	SNL shead = this->shead;
	if (!shead || !(shead->next)) {
		WrongInput("无链表头或无数据，无法显示");
		return -1;
	}
	printf("\n\n\t\t\t学号\t姓名\t语文\t数学\t英语\t物理\t化学\t生物\n");
	while (shead->next)
	{
		printf("\n\t\t  %10d%8s%8d%8d%8d%8d%8d%8d",
			shead->next->info,
			shead->next->name,
			shead->next->arr[0],
			shead->next->arr[1],
			shead->next->arr[2],
			shead->next->arr[3],
			shead->next->arr[4],
			shead->next->arr[5]);
		shead = shead->next;
	}
	return 0;
}
int stuSystem::ADD()
{
	SNL shead = this->shead;
	if (!shead)
	{
		WrongInput("无链表头，无法添加");
		return -1;
	}
	int info;
	int arr[6];
	char name[NAMESIZE] = { '\0' };
	cout << endl;
	cout << endl;
	cout << endl;
	cout<<"\t\t\t\t\t输入学号: ";
	delwar = scanf("%d", &info);
	cout<<"\t\t\t\t\t输入姓名: ";
	delwar = scanf("%s", name);
	for (int i = 0; i < 6; i++)
	{
		printf("\t\t\t\t\t输入%s成绩: ", subject[i]);
		delwar = scanf("%d", &arr[i]);
	}
	AddScore(info, arr, name);
	cout<<"\t\t\t\t\t添加成功\n";
	return 0;

}
SNL stuSystem::INIT()
{
	SNL node = new SN;
	node->next = NULL;
	return node;
}
int stuSystem::color(int x) //设置字体颜色

{

	if (x >= 0 && x <= 15) {
		SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), x);
	}

	else {
		SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), 7);
	}

	return 0;
}
int stuSystem::wait()
{
	cout << endl;
	cout << endl;
	cout << endl;
	cout << "\t\t\t\t\t";
	cout<<"输入回车结束";
	cout << endl;
	char wait = getchar();
	wait = getchar();
	return 0;
}
int stuSystem::MENU()
{
	int choice;
	cout<<"\n\n\n";
	cout<<"\t\t\t\t\t██████████████████████████\n";
	cout<<"\t\t\t\t\t█                        █\n";
	cout<<"\t\t\t\t\t█        < 菜单 >        █\n";
	cout<<"\t\t\t\t\t█       1.增加成绩       █\n";
	cout<<"\t\t\t\t\t█       2.删除成绩       █\n";
	cout<<"\t\t\t\t\t█       3.修改成绩       █\n";
	cout<<"\t\t\t\t\t█       4.查询成绩       █\n";
	cout<<"\t\t\t\t\t█       5.显示成绩       █\n";
	cout<<"\t\t\t\t\t█       6.排序成绩       █\n";
	cout<<"\t\t\t\t\t█       0.退出           █\n";
	cout<<"\t\t\t\t\t█                        █\n";
	cout<<"\t\t\t\t\t██████████████████████████\n";
	cout<<"\n\t\t\t\t\t选择> ";
	cin >> choice;
	system("cls");
	return choice;
}
int stuSystem::WrongInput(const char* warn)
{
	system("cls");
	color(4);
	cout << endl << endl;
	cout << endl << endl;
	cout << endl << endl << endl;
	cout << "\t\t\t\t\t\t";
	cout<<warn;
	cout << endl;
	color(7);
	return 0;
}
int stuSystem::AddScore(const int info, const int arr[6], const char name[NAMESIZE])
{
	SNL shead = this->shead;
	if (!shead)
	{
		WrongInput("无链表头，无法添加");
		return 0;
	}
	while (shead->next) {
		shead = shead->next;
	}
	SNL snode = INIT();
	shead->next = snode;
	snode->info = info;
	for (int i = 0; i < 6; i++) {
		snode->arr[i] = arr[i];
	}
	strcpy(snode->name, name);
	return 0;
}
int stuSystem::FILEREAD()
{
	if (!shead)
	{
		WrongInput("链表头不存在，读取失败");
		return -1;
	}
	FILE* file = fopen(FILENAME, "r");
	if (!file)
	{
		WrongInput("文件不存在,读取失败");
		return -1;
	}
	while (!feof(file))
	{
		int info = -1;
		int arr[6];
		char name[NAMESIZE] = { '\0' };
		delwar = fscanf(file, "%d%s%d%d%d%d%d%d", 
			&info, 
			name, 
			&arr[0], 
			&arr[1], 
			&arr[2], 
			&arr[3], 
			&arr[4], 
			&arr[5]);
		if (info != -1) {
			AddScore(info, arr, name);
		}
	}
	fclose(file);
	return 0;
}
int stuSystem::FILEWRITE()
{
	if (!shead)
	{
		WrongInput("链表头不存在，写入失败");
		return -1;
	}
	FILE* file = fopen(FILENAME, "w");
	if (!file)
	{
		WrongInput("文件写入失败");
		return -1;
	}
	while (shead->next)
	{
		fprintf(file, "%d %s %d %d %d %d %d %d\n",
			shead->next->info, 
			shead->next->name, 
			shead->next->arr[0],
			shead->next->arr[1], 
			shead->next->arr[2], 
			shead->next->arr[3],
			shead->next->arr[4], 
			shead->next->arr[5]);
		shead = shead->next;
	}
	return 0;
}
int System()
{
	stuSystem* SYSTEM = new stuSystem();
	SYSTEM->FILEREAD();
	while (true)
	{
		switch (SYSTEM->MENU())
		{
		case 1:
			SYSTEM->ADD();
			break;
		case 2:
			SYSTEM->DEL();
			break;
		case 3:
			SYSTEM->CHANGE();
			break;
		case 4:
			SYSTEM->SEARCH();
			break;
		case 5:
			SYSTEM->SHOW();
			break;
		case 6:
			SYSTEM->SORT();
			break;
		case 0:
			cout<<"\n\n\n\n\n";
			cout<<"\t\t\t\t\t\t";
			cout<<"成功退出";
			SYSTEM->FILEWRITE();
			exit(0);
			break;
		default:
			SYSTEM->WrongInput("错误输入警告");
			break;
		}
		SYSTEM->wait();
		system("cls");
	}
}