1 files changed, 185 insertions, 0 deletions
diff --git a/I_anno/Programmazione_1/lab_28_02_19_C.cc b/I_anno/Programmazione_1/lab_28_02_19_C.cc
new file mode 100644
index 0000000..ac53815
--- /dev/null
+++ b/I_anno/Programmazione_1/lab_28_02_19_C.cc
@@ -0,0 +1,185 @@
+#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;
+}