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#include<iostream>
#include<cmath>
#include<set>
#define DIM 10
using namespace std;
class A {
public:
A(short m) : len{m} {
srand(time(NULL));
base = new char[len];
for(int i = 0; i < len; ++i) {
base[i] = rand()%('z'-'a'+1)+'a';
}
}
~A() {
delete base;
}
short getLen() {
return len;
}
virtual string extract(short x) = 0;
virtual void print(ostream& os) = 0;
protected:
char get(short i) {
return base[i];
}
private:
char* base;
short len;
};
class B : public A {
public:
B(short m, double p) : A{m} {
for(int i = 0; i < m; ++i) {
switch(get(i)) {
case 'a':
case 'e':
case 'i':
case 'o':
case 'u':
str+=get(i);
}
}
}
double foo(short s) {
return sin(k+s)/log(s+1);
}
string extract(short x) override {
string x2{""};
short inserted{};
set<char> chars_a;
for(int i = 0; i < getLen(); ++i)
chars_a.insert(get(i));
while(inserted < x) {
char r_char = rand()%('z'-'a'+1)+'a';
if(chars_a.find(r_char) != chars_a.end()) {
x2+=r_char;
++inserted;
}
}
return x2;
}
void print(ostream& os) override {
os << "B: base=[";
for(int i = 0; i < getLen(); ++i) {
os << get(i) << ' ';
}
os << "], str=" << str << ", k=" << k;
}
private:
string str;
double k;
};
class C : public A {
public:
C(short n, int k) : A{n}, y{k} {}
double g(short w) {
return sin(w+y);
}
string extract(short x) override {
string x2{""};
char* narr = new char[x];
short counter_narr{};
for(int i = 0; i < getLen(); ++i) {
switch(get(i)) {
case 'a':
case 'e':
case 'i':
case 'o':
case 'u':
break;
default:
narr[counter_narr++] = get(i);
}
}
for(int i = 0; i < x; ++i)
x2+=narr[i];
delete[] narr;
return x2;
}
void print(ostream& os) override {
os << "C: base=[";
for(int i = 0; i < getLen(); ++i) {
os << get(i) << ' ';
}
os << "], y=" << y;
}
C operator++(int) {
C temp{*this};
y++;
return temp;
}
private:
int y;
};
ostream& operator<<(ostream& os, A& a) {
a.print(os);
return os;
}
int main() {
A *vett[DIM];
double sum{};
short i_c{-1};
for(int i=0; i<DIM; i++) {
short n=10+rand()%10;
switch(rand()%2){
case 0: {
vett[i]= new C(n, rand()%20 + 1);
auto cref = dynamic_cast<C*>(vett[i]);
sum+=cref->g(5);
i_c = i;
break;
}
case 1: {
vett[i]= new B(n, rand()/(double) RAND_MAX);
auto bref = dynamic_cast<B*>(vett[i]);
sum+=bref->foo(5);
break;
}
}
}
for(int i=0; i<DIM; i++)
cout << *(vett[i]) << ", extract(3)=" << vett[i]->extract(3) << endl;
cout << sum/DIM << endl;
if(i_c >= 0) {
cout << *vett[i_c] << endl;
auto cref = dynamic_cast<C*>(vett[i_c]);
(*cref)++;
cout << *vett[i_c] << endl;
}
return 0;
}
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