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-rw-r--r--I_anno/Programmazione_1/lab_28_02_19.cc162
1 files changed, 162 insertions, 0 deletions
diff --git a/I_anno/Programmazione_1/lab_28_02_19.cc b/I_anno/Programmazione_1/lab_28_02_19.cc
new file mode 100644
index 0000000..4639f66
--- /dev/null
+++ b/I_anno/Programmazione_1/lab_28_02_19.cc
@@ -0,0 +1,162 @@
+#include<iostream>
+#include<cstdlib>
+#include<cmath>
+#define DIM 50
+using namespace std;
+
+class A {
+public:
+ A(short m, char c) : len{m} {
+ ptr = new char[len];
+ srand(time(NULL));
+ for(int i = 0; i < m; ++i) {
+ ptr[i] = static_cast<char>(rand()%(c-'a'+1) + 'a');
+ }
+ }
+ A(const A& a) = default;
+ ~A() {
+ delete ptr;
+ }
+
+ virtual string elab(short a, char c) = 0;
+ virtual void print(ostream& o) = 0;
+ short getLen() {
+ return len;
+ }
+
+ char& operator[](int i) {
+ return ptr[i];
+ }
+
+protected:
+ char get(short i) {
+ if(i > len)
+ return ptr[0];
+
+ return ptr[i];
+ }
+
+private:
+ char* ptr;
+ short len;
+};
+
+class B : public A {
+public:
+ B(short m, double y, char c) : A{m, c}, x{y} {}
+ double foo(short s) {
+ return sin(x+s)/log(x+s);
+ }
+
+ string elab(short a, char c) {
+ string st{};
+ for(int i = 0; i < getLen(); ++i) {
+ auto ch = get(i);
+ if(abs(ch-c) <= a) {
+ st+=ch;
+ }
+ }
+
+ return st;
+ }
+
+ void print(ostream& os) {
+ os << "B ptr=[";
+ for(int i = 0; i < getLen(); ++i)
+ os << get(i) << ' ';
+
+ os << "], x=" << x << ", elab(5, z)=" << elab(5, 'z');
+ }
+
+private:
+ double x;
+};
+
+template<typename T>
+class C : public A {
+public:
+ C(short n, double k, char c) : A{n, c} {
+ if(typeid(T) == typeid(short))
+ y = static_cast<int>(100*k);
+ else
+ y = k;
+ }
+
+ string elab(short a, char c) {
+ string st{};
+ if(getLen() >= a) {
+ if(a >= 1) {
+ for(int i = 0; i < getLen(); st+=c, ++i);
+ }
+ } else {
+ for(int i = 0; i < getLen(); st += get(i++));
+ }
+
+ return st;
+ }
+
+ double g(short w) {
+ return sin(w+y);
+ }
+
+ void print(ostream& os) {
+ os << "C<" << typeid(T).name() << "> ptr=[";
+ for(int i = 0; i < getLen(); ++i)
+ os << get(i) << ' ';
+
+ os << "], y=" << y << ", elab(5, z)=" << elab(5, 'z');
+ }
+private:
+ T y;
+};
+
+ostream& operator<<(ostream& os, A& a) {
+ a.print(os);
+
+ return os;
+}
+
+int main() {
+ srand(time(NULL));
+
+ A *vett[DIM];
+ short cb{}, cc{};
+ double sumb{}, sumc{};
+
+ for(int i=0; i<DIM; i++) {
+ short n=1+rand()%10;
+ switch(rand()%3) {
+ case 0:
+ {
+ vett[i]= new B(n, (double) rand()/RAND_MAX, rand()%('z' - 'a' + 1) + 'a');
+ auto temp = dynamic_cast<B&>(*(vett[i]));
+ sumb+=temp.foo(5);
+ ++cb;
+ break;
+ }
+ case 1:
+ vett[i]= new C<double>(n, (double) rand()/RAND_MAX, rand()%('z' - 'a' + 1) + 'a');
+ break;
+ case 2:
+ {
+ vett[i]= new C<short>(n, (double) rand()/RAND_MAX, rand()%('z' - 'a' + 1) + 'a');
+ auto temp = dynamic_cast<C<short>&>(*(vett[i]));
+ sumc+=temp.g(5);
+ ++cc;
+ }
+ }
+ }
+
+ for(int i=0; i<DIM; i++) {
+ cout << *vett[i] << endl;
+ }
+
+ cout << "avg(foo(5))=" << sumb/cb << " ";
+ cout << "avg(g(5))=" << sumc/cc << endl;
+
+ cout << endl;
+ cout << *vett[0] << endl;
+ (*vett[0])[0] = '$';
+ cout << *vett[0] << endl;
+ return 0;
+}