#include <iostream>
#include <vector>
#include <string>

using namespace std;

class SinhVien
{
protected:
    int maSV;
    string hoTen;
    string diaChi;
    int tongsoTC;
    float diemTB;

public:
    SinhVien(int, string, string, int, float);
    void printfSV();
    int masoSV() { return maSV; }
    string hoTenn() { return hoTen; }
    string diaChii() { return diaChi; }
    int ttongsoTC() { return tongsoTC; }
    float ddiemTB() { return diemTB; }
};

SinhVien::SinhVien(int maSV, string hoTen, string diaChi, int tongsoTC, float diemTB)
{
    this->maSV = maSV;
    this->hoTen = hoTen;
    this->diaChi = diaChi;
    this->tongsoTC = tongsoTC;
    this->diemTB = diemTB;
}

void SinhVien::printfSV()
{
    cout << "[" << maSV << ", " << hoTen << ", " << diaChi << ", " << tongsoTC << ", " << diemTB << "]";
    cout << "\n";
}

class SVVB2 : public SinhVien
{
private:
    float diemTN;

public:
    SVVB2(int maSV, string hoTen, string diaChi, int tongsoTC, float diemTB, float diemTN) : SinhVien(maSV, hoTen, diaChi, tongsoTC, diemTB), diemTN(diemTN)
    {
    }
};

class SVHDH : public SinhVien
{
private:
    string tenLV;
    float diemLV;

public:
    SVHDH(int maSV, string hoTen, string diaChi, int tongsoTC, float diemTB, string tenLV, float diemLV) : SinhVien(maSV, hoTen, diaChi, tongsoTC, diemTB), tenLV(tenLV), diemLV(diemLV)
    {
    }
};

class TruongDaiHoc
{
private:
    string tenTruong;
    vector<SinhVien *> sv;
    int soSV;

public:
    TruongDaiHoc(string);
    ~TruongDaiHoc();
    void initDsSv();
    void printfDsSv();
    void xetTN();
};

TruongDaiHoc::TruongDaiHoc(string tenTruong)
{
    this->tenTruong = tenTruong;
    this->soSV = 0;
}

TruongDaiHoc::~TruongDaiHoc()
{
    for (int i = 0; i < sv.size(); ++i)
    {
        delete sv[i];
    }
}

void TruongDaiHoc::initDsSv()
{
    sv.push_back(new SVVB2(2301, "Nguyen Van Minh", "HCM", 90, 8.0, 7.8));
    sv.push_back(new SVVB2(2305, "Tran Thi Thu", "NamDinh", 95, 8.5, 8.7));
    sv.push_back(new SVVB2(2334, "Pham Quoc Cuong", "PhuYen", 86, 4.9, 5.2));
    sv.push_back(new SVVB2(2376, "Ngo Ba Vinh", "QuangNgai", 82, 6.3, 5.9));
    sv.push_back(new SVVB2(2342, "Ma Tuan Phong", "HaNoi", 92, 8.2, 8.5));
    sv.push_back(new SVHDH(1826, "Cao Van Kien", "NinhThuan", 135, 7.3, "Gialapmang", 7.0));
    sv.push_back(new SVHDH(1832, "Nguyen Thi Tra", "HoaBinh", 127, 8.4, "Vuonxanh", 8.2));
    sv.push_back(new SVHDH(1759, "Tu Van Khang", "ThaiNguyen", 112, 4.9, "Traingot", 5.2));
    sv.push_back(new SVHDH(1778, "Pham Ninh Duong", "KienGiang", 128, 6.3, "Xulyrac", 7.5));
    sv.push_back(new SVHDH(1895, "Bui Tuan Huy", "Hue", 122, 7.2, "Thietkenha", 7.0));
    soSV = 10;
}

void TruongDaiHoc::printfDsSv()
{
    for (int i = 0; i < soSV; i++)
    {
        sv[i]->printfSV();
    }
    cout << "\n";
}

void TruongDaiHoc::xetTN()
{
    for (int i = 0; i < soSV; i++)
    {
        if (sv[i]->ttongsoTC() >= 84 && sv[i]->ddiemTB() >= 5.0 && sv[i]->ddiemTB() >= 5.0)
        {
            cout << "Sinh vien co ma: " << sv[i]->masoSV() << " du dieu kien tot nghiep." << endl;
        }
        else
        {
            cout << "Sinh vien co ma: " << sv[i]->masoSV() << " khong du dieu kien tot nghiep." << endl;
        }
    }
}

int main()
{
    TruongDaiHoc dh("DHCongNgheThongTin");
    dh.initDsSv();
    dh.printfDsSv();
    dh.xetTN();
    return 0;
}
 
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Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
} 

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
} 

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}  

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition); 

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}