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#include <iostream>
#include <string.h>
#include <fstream>
#include <iomanip>
#pragma warning(disable:4996)
#define MAX 100
using namespace std;

typedef struct SinhVien
{
	char masv[10], ho[10], ten[20];
	int diem;
	bool Delete = false;
} sv;
typedef struct IndexHoTen
{
	int vitri;
	char ho[10], ten[20];
} idxHT;

typedef struct IndexMaSV
{
	int vitri;
	char masv[10];
} idxMSV;

typedef struct IndexDiem
{
	int vitri, diem;
} idxDiem;
int n;
sv DS[MAX];
idxHT IndexHoTen[100];
idxMSV IndexMaSV[100];
idxDiem IndexDiem[100];

void CapNhatIndex(sv a, int i)
{
	IndexDiem[i].diem = a.diem;
	IndexDiem[i].vitri = i;

strcpy(IndexHoTen[i].ho, a.ho);
	strcpy(IndexHoTen[i].ten, a.ten);
	IndexHoTen[i].vitri = i;

strcpy(IndexMaSV[i].masv, a.masv);
	IndexMaSV[i].vitri = i;

}
void Nhap1(sv &a)
{
nhaplaimsv:
	cout << "Nhap vao Ma Sinh Vien: ";
	fflush(stdin);
	cin >> a.masv;
	//if () ktra trung
	cout << "Nhap vao Ho: ";
	cin >> a.ho;
	cout << "Nhap vao Ten: ";
	cin >> a.ten;
nhaplaidiem:
	cout << "nhap vao Diem: ";
	cin >> a.diem;
	if (a.diem < 0 || a.diem >10)
		goto nhaplaidiem;
}

void Xuat1(sv a)
{
	cout << left << setw(10) << a.masv << "\t";
	cout << left << setw(10) << a.ho << "\t";
	cout << left << setw(20) << a.ten << "\t";
	cout << left << setw(4) << a.diem << endl;
}

int TimTheoMSV(sv DS[], int n, char masvcantim[10])
{
	for (int i = 0; i < n; i++)
	{
		if (strcmp(DS[i].masv, masvcantim) == 0 && DS[i].Delete == false)
			return i;
	}
	return -1;
}

void TimTheoTen(sv DS[], int n)
{
	for (int j = 0; j < n - 1; j++)
	{
		for (int k = j + 1; k < n; k++)
		{
			if (IndexDiem[j].diem > IndexDiem[k].diem)
			{
				idxDiem temp;
				temp = IndexDiem[k];
				IndexDiem[k] = IndexDiem[j];
				IndexDiem[j] = temp;
			}
		}
	}
	bool check = false;
	char tencantim[20];
	cout << "Nhap vao ten sinh vien can tim: ";
nhaplai:
	cin >> tencantim;
	if (strcmp(tencantim, "0") == 0)
		return;
	for (int i = 0; i < n; i++)
	{
		if (strcmp(tencantim, DS[i].ten) == 0 && tencantim !=0 && DS[i].Delete == false)
		{
			for (int j = 0; j < n; j++)
			{
				if (IndexDiem[j].vitri == i)
				{
					cout <<"MSSV: "<<DS[i].masv<< "\tHo: "<<DS[i].ho<<"\tTen: " << DS[i].ten << "\tDiem: " << IndexDiem[j].diem << endl;
					check = true;
				}
			}
		}
	}
	if (check == false)
	{
		cout << "Khong tim thay sinh vien ten: " << tencantim << endl;
		cout << "Vui long nhap lai(nhap 0 de thoat): " << endl;
		goto nhaplai;
	}
}

void Xoa(sv DS[], int &n)
{
	int i = 0;
	char macanxoa[10];
	cout << "Nhap vao ma sinh vien can xoa: ";
	cin >> macanxoa;
	TimTheoMSV(DS, n, macanxoa);
	DS[i].Delete = true;
}

void Them(sv DS[], int &n)
{
	int soluongthem, k = n, j = 1;
nhap:
	cout << "Nhap vao so luong sinh vien can them";
	cin >> soluongthem;
	if (n + soluongthem > 100 || soluongthem < 0)
	{
		cout << "Ban da nhap sai so luong. vui long nhap lai! " << endl;
	}
	else
	{
		n = n + soluongthem;
		for (int i = k; i < n; i++)
		{
			cout << "Nhap vao thong tin sinh vien thu " << j << endl;
			Nhap1(DS[i]);
			j++;
			CapNhatIndex(DS[i], i);
		}
	}
}

void Sua(sv DS[], int n)
{
	char masvcan[10];
	cout << "Nhap vao ma sinh vien can tim: ";
nhapsvcantim:
	cin >> masvcan;
	if (TimTheoMSV(DS, n, masvcan) == -1)
	{
		cout << "Khong tim thay sinh vien can tim! vui long nhap lai:" << endl;
		goto nhapsvcantim;
	}
	else
	{
		int i = TimTheoMSV(DS, n, masvcan);
		int select;
		system("cls");
		cout << "1. Sua ma sv \n2. Sua Ho \n3. Sua ten \n4. Sua diem \n0. Back" << endl;
	nhaplai:
		cin >> select;
		switch (select)
		{
		case 1:
			cout << "Nhap vao ma sinh vien moi: ";
			cin >> DS[i].masv;
			break;
		case 2:
			cout << "Nhap vao ho moi: ";
			cin >> DS[i].ho;
			break;
		case 3:
			cout << "Nhap vao ten moi: ";
			cin >> DS[i].ten;
			break;
		case 4:
			cout << "Nhap vao diem moi: ";
			cin >> DS[i].diem;
			break;
		case 0:
			break;
		default:
			cout << "Lua chon khong dung! vui long nhap lai: " << endl;
			goto nhaplai;
			break;
		}
	}
}

void MenuXuat(sv DS[], int n)
{
	int select;
nhap:
	system("cls");
	cout << "================================Menu================================" << endl;
	cout << "1.Sap xep theo MSSV \n2.Sap xep theo ten \n3.Sap xep theo diem \n0.Back!" << endl;
	cin >> select;
	switch (select)
	{

case 1:
		cout << "Xuat theo MSSV: " << endl;
		for (int j = 0; j < n - 1; j++)
		{
			for (int k = j + 1; k < n; k++)
			{
				if (strcmp(IndexMaSV[j].masv , IndexMaSV[k].masv)>0)
				{
					idxMSV temp;
					temp = IndexMaSV[k];
					IndexMaSV[k] = IndexMaSV[j];
					IndexMaSV[j] = temp;
				}
			}
		}
		cout << endl << left << setw(13) << "MSSV\t" << left << setw(10) << "HO\t" << left << setw(20) << " TEN\t" << left << setw(4) << "DIEM\t" << endl;
		for (int i = 0; i < n; i++)
		{
			Xuat1(DS[IndexMaSV[i].vitri]);
		}
		system("pause");
	case 2:
		cout << "Xuat theo ten: " << endl;
		for (int j = 0; j < n - 1; j++)
		{
			for (int k = j + 1; k < n; k++)
			{
				if (strcmp(IndexHoTen[j].ten, IndexHoTen[k].ten)>0)
				{
					idxHT temp;
					temp = IndexHoTen[k];
					IndexHoTen[k] = IndexHoTen[j];
					IndexHoTen[j] = temp;
				}
				else if (IndexHoTen[k].ten == IndexHoTen[j].ten)
				{
					if (IndexHoTen[k].ho < IndexHoTen[j].ho)
					{
						idxHT temp;
						temp = IndexHoTen[k];
						IndexHoTen[k] = IndexHoTen[j];
						IndexHoTen[j] = temp;
					}
				}
			}
		}
		cout << endl << left << setw(13) << "MSSV\t" << left << setw(10) << "HO\t" << left << setw(20) << " TEN\t" << left << setw(4) << "DIEM\t" << endl;
		for (int i = 0; i < n; i++)
		{
			Xuat1(DS[IndexHoTen[i].vitri]);
		}
		system("pause");
	case 3:
		cout << "Xuat theo Diem: " << endl;
		for (int j = 0; j < n - 1; j++)
		{
			for (int k = j + 1; k < n; k++)
			{
				if (IndexDiem[k].diem > IndexDiem[j].diem)
				{
					idxDiem temp;
					temp = IndexDiem[k];
					IndexDiem[k] = IndexDiem[j];
					IndexDiem[j] = temp;
				}
			}
		}
		cout << endl << left << setw(13) << "MSSV\t" << left << setw(10) << "HO\t" << left << setw(20) << " TEN\t" << left << setw(4) << "DIEM\t" << endl;
		for (int i = 0; i < n; i++)
		{
			Xuat1(DS[IndexDiem[i].vitri]);
		}
		system("pause");
	default:
		break;
	}

}

void Menu()
{
nhap:
	system("cls");
	cout << "================================Menu================================" << endl;
	cout << "1.Them sv\n2.Xuat\n3.Xoa sv\n4.Sua sv\n5.Tim sv theo mssv\n6.Tim sv theo ten\n7.Luu File\n8.Doc File\n0.Thoat!" << endl;

int chon;
	cout << "Nhap chon: ";	cin >> chon;
	if (chon == 0)
		return;
	else if (chon == 1)
	{
		Them(DS, n);	system("pause");
	}
	else if (chon == 2)
	{
		MenuXuat(DS,n);
		system("pause");
	}
	else if (chon == 3)
	{
		Xoa(DS, n);	system("pause");
	}
	else if (chon == 4)
	{
		Sua(DS, n);
	}
	else if (chon == 5)
	{
		char masvcan[10];
		cout << "Nhap vao ma sinh vien can tim: ";
		cin >> masvcan;
		if (TimTheoMSV(DS, n, masvcan) == -1)
		{
			cout << "Khong tim thay sinh vien co ma sinh vien la: " << masvcan << endl;
		}
		else
		{
			int i = TimTheoMSV(DS, n, masvcan);
			Xuat1(DS[i]);
		}
		system("pause");
	}
	else if (chon == 6)
	{
		TimTheoTen(DS, n);
		system("pause");
	}
	else if (chon == 7)
	{
		//LuuFile();		system("pause");
	}
	else if (chon == 8)
	{
		//DocFile();			system("pause");
	}
	else
	{
		cout << "\nban nhap sai.\nMoi ban nhap lai!\n";			system("pause");
	}
	goto nhap;

}
int main()
{
	Menu();
	system("pause");
	return 0;
}

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