Students

#ifndef _STUDENT_H_
#define _STUDENT_H_

typedef unsigned u ;

class Student
{
 public:
    virtual u exercise() = 0;
    virtual ~Student() = 0;
};

class Boy : public Student
{
 public:
    u exercise() override;
    ~Boy() override;
};

class NotBoy : public Student
{
 public:
    u exercise() override;
    ~NotBoy() override;
};


#endif//_STUDENT_H_







#include "student.h"
#include <cstdlib>
#include <ctime>
#include <cstdio>

Student::~Student()
= default;

u Boy::exercise ( )
{
    const u x = std::rand() % (20 - 15 + 1) + 15;
    std::printf("I've done %u push-ups\n", x);
    return x;
}
Boy::~Boy()
= default;

u NotBoy::exercise ( )
{
    const u x = std::rand() % (20 - 15 + 1) + 15;
    std::printf("I've done %u squats\n", x);
    return x;
}
NotBoy::~NotBoy()
= default;








#include "student.h"
#include <cstdlib>
#include <ctime>
#include <cstdio>

int main ( )
{
    srand(time(nullptr));
    u amount = 0;
    for(u i = 0; i < 25; i++)
    {
        Student* a;
        const u x = rand() % (1 - 0 + 1) + 0;
        x == 0 ? a = new Boy : a = new NotBoy;
        if(a -> exercise() >= 20) amount++;
        delete a;
    }
    std::printf("%d students passed test", amount);
    return 0;
}