Tạo class Sinh vien, tính điểm trung bình, sắp xếp theo điểm trung bình, xuất điểm trung bình > 7, xoá 1 vị trí bất kỳ

sinhvien.cpp

#include <bits/stdc++.h>
#include <iomanip>
using namespace std;
#define foreach(length) for(int i = 0; i < length; ++i)

class SinhVien {
	public:
		string maSV;
		string hoTen;
		string lop;
		float tin1, tin2, tin3, tin4, diemTB;
	public: 
		SinhVien() {
			maSV = "";
			hoTen = "";
			lop = "";
			tin1 = 0;
			tin2 = 0;
			tin3 = 0;
			tin4 = 0;
			diemTB = 0;
		}
		void tinhTB() {
			diemTB =  (tin1 + tin2 + tin3 + tin4) / 4;
		}
		float getDiemTB() {
			return diemTB;
		}
		void nhap() {
			cout<<"Nhap ma SV: "; cin.ignore(); getline(cin, maSV);
			cout<<"Nhap ho ten: "; getline(cin, hoTen);
			cout<<"Nhap lop: "; getline(cin, lop);
			cout<<"Nhap diem Tin 1 - 2 - 3 - 4: "; 
			cin>>tin1>>tin2>>tin3>>tin4;
			tinhTB();
		}
		void in() {
			cout<<"Ma SV: "<<maSV<<" | ";
			cout<<"Ho ten: "<<hoTen<<" | ";
			cout<<"Lop: "<<lop<<" | ";
			cout<<"Tin 1: "<<tin1<<" | ";
			cout<<"Tin 2: "<<tin2<<" | ";
			cout<<"Tin 3: "<<tin3<<" | ";
			cout<<"Tin 4: "<<tin4<<" | ";
			cout<<"Diem trung binh: "<<diemTB<<"\n";

		};	
};

void nhapLop(SinhVien sv[], int n) {
	foreach(n) {
		cout<<"Nhap thu sinh thu "<<i + 1<<endl;
		sv[i].nhap();
	}
}
void inLop(SinhVien sv[], int n) {
	foreach(n) sv[i].in();
}

void swap(SinhVien *a, SinhVien *b) {
	SinhVien temp;

	temp = *a;
	*a = *b;
	*b = temp;
}

void bubleSort(SinhVien sv[], int length) {
	int i, j;
	for(int i = 0; i < length - 1; i++) {
		for(int j = 0; j < length - i - 1; j++) {
			if(sv[j].getDiemTB() > sv[j + 1].getDiemTB()) {
				swap(&sv[j], &sv[j + 1]);
			}
		}
	}
}

void lonHon7(SinhVien sv[], int length) {
	foreach(length) {
		if(sv[i].getDiemTB() > 7) {
			sv[i].in();
		}
	}
}

void xoaPhanTu(SinhVien sv[], int &length, int pos) {
	if(pos < 0) pos = 0;
	if(pos >= length) pos = length - 1;

	for(int i = pos; i < length - 1; i++) {
		sv[i] = sv[i + 1];
	}
	length--;
}

int main() {
	SinhVien sv[30];
	int n;
	cout<<"Nhap si so cua lop: "; cin>>n;

	nhapLop(sv, n);
	inLop(sv, n);
	
	cout<<"\nSap xep theo diem trung binh: \n";
	bubleSort(sv, n);
	inLop(sv, n);

	cout<<"\nDiem trung binh > 7: \n";
	lonHon7(sv, n);

	int key;
	cout<<"\nNhap vi tri muon xoa: "; cin>>key;
	cout<<"\nMang sau khi xoa: \n";
	xoaPhanTu(sv, n, key - 1);
	inLop(sv, n);


	cout<<endl; system("pause"); return 0;
}