Sắp xếp sinh viên.cpp

#include<iostream>

#include<stdio.h>

#include<math.h>

#include<string.h>

using namespace std;
struct NGAYTHANG {
    int ngay;
    int thang;
    int nam;
};
struct SV {
    char masv[12];
    char hodem[30];
    char ten[10];
    NGAYTHANG ngsinh;
    char gioitinh[4];
    char hokhau[20];
    float diem;
};
void Nhapsv(SV * sv) {
    cout << "\tMa sv: ";
    cin >> sv->masv;
    cout << "\tHo dem: ";
    cin.ignore();
    fgets(sv->hodem, sizeof(sv->hodem), stdin);
    sv->hodem[strlen(sv->hodem) - 1] = '\0';
    cout << "\tTen: ";
    cin.ignore();
    fgets(sv->ten, sizeof(sv->ten), stdin);
    cout << "\tNgay sinh: ";
    cin >> sv->ngsinh.ngay;
    cout << "\tThang sinh: ";
    cin >> sv->ngsinh.thang;
    cout << "\tNam sinh: ";
    cin >> sv->ngsinh.nam;
    cout << "\tGioi tinh: ";
    cin.ignore();
    fgets(sv->gioitinh, sizeof(sv->gioitinh), stdin);
    sv->gioitinh[strlen(sv->gioitinh) - 1] = '\0';
    cout << "\tHo khau: ";
    cin.ignore();
    fgets(sv->hokhau, sizeof(sv->hokhau), stdin);
    sv->hokhau[strlen(sv->hokhau) - 1] = '\0';
    cout << "\tDiem: ";
    cin >> sv->diem;

}
void Hienthisv(SV * sv) {
    cout << sv->masv;
    cout << "\t" << sv->hodem;
    cout << " " << sv->ten;
    cout << "\t" << sv->ngsinh.ngay;
    cout << "-" << sv->ngsinh.thang;
    cout << "-" << sv->ngsinh.nam;
    cout << "\t" << sv->gioitinh;
    cout << "\t" << sv->hokhau;
    cout << "\t" << sv->diem;
}
void Nhapds(SV *p, int n) {
    for (int i = 0; i < n; i++) {
        cout << "Nhap thong tin cua sv thu " << i + 1 << " :" << endl;
        Nhapsv(p + i);

    }
}
void Hienthids(SV *p, int n) {
    for (int i = 0; i < n; i++) {

        Hienthisv(p + i);
        cout << "\n";
    }
}
void Sapxep(SV *p, int n) {
    for (int i = 0; i < n; i++) {
        for (int j = i + 1; j < n; j++)
            if ((p + i)->diem > (p + j)->diem) {
                SV tmp = * (p + j);
                *(p + j) = * (p + i);
                *(p + i) = tmp;
            }
    }
}
int main() {
    SV *p;
    int n;
    do {
        cout << "Nhap vao so sv: ";
        cin >> n;
    }
    while (n < 0 || n > 10);
    p = new SV[n];
    cout << "Nhap vao thong tin " << n << " sv: " << endl;
    Nhapds(p, n);
    cout << "Hien thi thong tin vua nhap: " << endl;
    Hienthids(p, n);
    cout << "\nDanh sach sau khi sap xep la: " << endl;
    Sapxep(p, n);
    Hienthids(p, n);
    delete p;
    return 0;
}