#include <iostream>
#include <cstdlib>
#include <iomanip>

using namespace std;

bool next = true;
int jmlMhs;
string mhs[20][2];
int nilai[20][4];

void getMhs();
void display();
char getGrade(int nilai);
float getAverage();
int getMax();
int getMin();

int main()
{
    do{
        system("cls");
        cout << "================================" << endl;
        cout << "========= Hitung Nilai =========" << endl;
        cout << "================================" << endl;

        cout << "Jumlah mahasiswa (max 30) : " ;
        cin >> jmlMhs;

        getMhs();

        display();

        char x;
        cout << endl << "Ulang kembali ? (Y/N)" << endl;
        cin >> x;
        if(x == 'N' || x == 'n')
            next = false;

    }while(next == true);
    return 0;
}

void display(){
    system("cls");
    cout << "                          DAFTAR NILAI" << endl;
    cout << "                    PRODI TEKNIK INFORMATIKA" << endl;
    cout << "=================================================================" << endl;
    cout << ": No :    NIM    :       NAMA       : UTS : UAS : TUGAS : GRADE :" << endl;
    cout << "=================================================================" << endl;
    for(int i = 0; i < jmlMhs; i++){
        nilai[i][3] = (nilai[i][0] + nilai[i][1] + nilai[i][2]) / 3;
        cout << ":" << setw(3) << i+1 << setw(2) << ":"<< setw(8) <<  mhs[i][0] << setw(4)
             << ":" << setw(15) << mhs[i][1] << setw(4) << ":" << setw(4) << nilai[i][0] << setw(2)
             << ":" << setw(4) << nilai[i][1] << setw(2) << ":" << setw(4) << nilai[i][2] << setw(4)
             << ":" << setw(4) << getGrade(nilai[i][3]) << setw(4) << ":" << endl;
    }
    cout << "=================================================================" << endl;
    cout << "Jumlah data     : " << jmlMhs << endl;
    cout << "Rata kelas      : " << getAverage() << endl;
    cout << "Nilai tertinggi : " << getMax() << endl;
    cout << "Nilai terendah  : " << getMin() << endl;
}

void getMhs(){
    system("cls");
    for(int i = 0; i < jmlMhs; i++){
        cout << "===================" << endl;
        cout << "=== Mahasiswa " << i+1 << " ===" << endl;
        cout << "===================" << endl;
        cout << "NIM   : ";
        cin >> mhs[i][0];
        cout << "Nama  : ";
        cin >> mhs[i][1];
        cout << "UTS   : ";
        cin >> nilai[i][0];
        cout << "UAS   : ";
        cin >> nilai[i][1];
        cout << "Tugas : ";
        cin >> nilai[i][2];
        cout << endl;
    }
}

float getAverage(){
    float jml = 0;
    for(int i = 0; i < jmlMhs; i++){
        jml += nilai[i][3];
    }
    return jml / jmlMhs;
}

char getGrade(int nilai){
    if(nilai <= 50)
        return 'E';
    else if(nilai <= 60)
        return 'D';
    else if(nilai <= 70)
        return 'C';
    else if(nilai <= 80)
        return 'B';
    else
        return 'A';
}

int getMax(){
    int max = nilai[0][3];
    for(int i = 0; i < jmlMhs; i++){
        if(nilai[i][3] > max)
            max = nilai[i][3];
    }
    return max;
}

int getMin(){
    int min = nilai[0][3];
    for(int i = 0; i < jmlMhs; i++){
        if(nilai[i][3] < min)
            min = nilai[i][3];
    }
    return min;
}