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  1. // Bai 2
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4. class SV{
  5.     private:
  6.         char msv[15],nganh[20];
  7.         string ten;
  8.         string xep;
  9.         int ng,th,nam;
  10.         float toan,van,tin,tong;
  11.     public:
  12.         void nhap(){
  13.             cout<<"Nhap ho ten: "; getline(cin,ten);
  14.             cout<<"Ma sinh vien: "; cin.getline(msv,15);
  15.             cout<<"Nganh hoc: "; cin.getline(nganh,20);
  16.             cout<<"Ngay sinh(date): "; cin >> ng >> th >> nam;
  17.             while(ng > 31){
  18.                 cout<<"Moi nhap lai ngay: "; cin>>ng;
  19.             }
  20.             while(th > 12){
  21.                 cout<<"Moi nhap lai thang: "; cin>>th;
  22.             }
  23.             while(nam > 2024){
  24.                 cout<<"Moi nhap lai nam: "; cin>>nam;
  25.             }
  26.             cout<<"Nhap diem toan: "; cin >> toan;
  27.             cout<<"Nhap diem van: "; cin >> van;
  28.             cout<<"Nhap diem tin: "; cin >> tin;
  29.             cin.ignore();
  30.             cout<<endl;
  31.  
  32.         }
  33.         void tinh(){
  34.             tong = (toan*4 + van*4 + tin*2)/10;
  35.             if(tong >= 9){
  36.                 xep = "Xuat sac";
  37.             }else
  38.                 if(tong >= 7.5){
  39.                     xep = "Gioi";
  40.                 }else
  41.                     if(tong >= 6){
  42.                         xep = "Kha";
  43.                    }else
  44.                     if(tong >= 4){
  45.                         xep = "Trung binh";
  46.                     }else
  47.                         if(tong < 4){
  48.                             xep = "Yeu";
  49.                         }
  50.  
  51.         }
  52.  
  53.         void xuat(){
  54.             cout<<setw(20)<<left<<ten
  55.             <<setw(15)<<left<<msv;
  56.             if(ng<10) cout<<"0"<<ng<<"/";
  57.                 else cout<<ng<<"/";
  58.             if(th < 10) cout<<"0"<<th<<"/";
  59.                 else cout<<nam<<"/";
  60.             cout<<setw(10)<<left<<nam
  61.             <<setw(10)<<left<<nganh
  62.             <<setw(13)<<left<<tong
  63.             <<setw(10)<<left<<xep<<endl;
  64.         }
  65.         float gettong(){
  66.             return this->tong;
  67.         }
  68.         int getten(){
  69.             return this->ten.size();
  70.         }
  71. };
  72.  
  73. bool cmp(SV a, SV b){
  74.     if(a.gettong() < b.gettong()) return a.gettong();
  75.         // if(a.gettong() > b.gettong())  return b.gettong();
  76.         // else{
  77.     if(a.gettong() == b.gettong()){
  78.         if(a.getten() < b.getten()) return a.getten();
  79.     }
  80.         //         else return b.getten();
  81.         //     }
  82.         // }
  83. }
  84. int main(){
  85.     int n;
  86.     cout<<"Nhap so luong sv: "; cin >> n;
  87.     SV sv[n];
  88.     cin.ignore();
  89.     for(int i = 0; i < n; i++){
  90.         sv[i].nhap();
  91.         sv[i].tinh();
  92.     }
  93.     sort(sv,sv+n,cmp);
  94.     cout<<endl<<"--------\n";
  95.     cout<<setw(20)<<left<<"Ho va ten"
  96.     <<setw(15)<<left<<"Ma sinh vien"
  97.     <<setw(16)<<left<<"Ngay sinh"
  98.     <<setw(10)<<left<<"Nganh"
  99.     <<setw(13)<<left<<"Diem tong"
  100.     <<setw(10)<<left<<"Xep loai"<<endl;
  101.     for(int i = 0; i < n; i++){
  102.         sv[i].xuat();
  103.     }
  104.  
  105. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
copy 
3
Do Hieu
123
IT
11 3 2005
7.8
9.2
10
Pham Huu Chinh
222
oto
3 1 2001
2
6
5
Nguyen Canh
333
it
1 3 2001
7.8
9.2
10
stdout
copy 
Nhap so luong sv: Nhap ho ten: Ma sinh vien: Nganh hoc: Ngay sinh(date): Nhap diem toan: Nhap diem van: Nhap diem tin: 
Nhap ho ten: Ma sinh vien: Nganh hoc: Ngay sinh(date): Nhap diem toan: Nhap diem van: Nhap diem tin: 
Nhap ho ten: Ma sinh vien: Nganh hoc: Ngay sinh(date): Nhap diem toan: Nhap diem van: Nhap diem tin: 

--------
Ho va ten           Ma sinh vien   Ngay sinh       Nganh     Diem tong    Xep loai  
Nguyen Canh         333            01/03/2001      it        8.8          Gioi      
Pham Huu Chinh      222            03/01/2001      oto       4.2          Trung binh
Do Hieu             123            11/03/2005      IT        8.8          Gioi
https://ideone.com/HwBKVo
language:
C++ (gcc 8.3)
created:
76 days ago
visibility:
public

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