Справочное руководство по C++

 sz = s;
 v = new int[s];
}

int& vector::operator[](int i)
{
 if (i‹0 || sz‹=i) error("vector index out of range");
 return v[i];
}

vector::~vector
{
 delete v;
}

// 1.13
int& vec::elem(int i)
{
 return vector::elem(i-low);
}

vec::vec(int lb, int hb): (hb-lb+1)
{
 if (hb-lb‹0) hb = lb;
 low = lb;
 high = hb;
}

void vector::set_size(int) {/* dummy */}

int& vec::operator[](int i)
{
 if (i‹low || high‹i) error("vec index out of range");
 return elem(i);
}

b1__14.cxx

#include‹stream.hxx›

extern void exit(int);
extern void error(char*);

// 1.11
class vector {
 int *v;
 int sz;
public:
 vector(int); // constructor
 ~vector; // destructor
 int size { return sz; }
 void set_size(int);
 int& operator[](int);
 int& elem(int i) { return v[i]; }
};

vector::vector(int s)
{
 if (s‹=0) error("bad vector size");
 sz = s;
 v = new int[s];
}

int& vector::operator[](int i)
{
 if (i‹0 || sz‹=i) error("vector index out of range");
 return v[i];
}

vector::~vector
{
 delete v;
}

// 1.14
class Vec: public vector {
public:
 Vec(int s): (s) {}
 Vec(Vec&);
 ~Vec {}
 void operator=(Vec&);
 void operator*=(Vec&);
 void operator*=(int);
};

Vec::Vec(Vec& a): (a.size)
{
 int sz = a.size;
 for (int i = 0; i‹sz; i++) elem(i) =a.elem(i);
}

void Vec::operator=(Vec& a)
{
 int s = size;
 if (s != a.size) error("bad vector size for =");
 for (int i =0; i‹s; i++) elem(i)=a.elem(i);
}

Vec operator+(Vec& a, Vec& b)
{
 int s = a.size;
 if (s!= b.size) error("bad vector size for +");
 Vec sum(s);
 for (int i=0; i‹s; i++)
 sum.elem(i) = a.elem(i) + b.elem(i);
 return sum;
}

void error(char* p)
{
 cerr ‹‹ p ‹‹ "\n";
 exit (1);
}

void vector::set_size(int) {}

main
{
 Vec a(10);
 Vec b(10);
 for (int i=0; i‹a.size; i++) a[i] = i;
 b = a;
 Vec c = a+b;
 for (i=0; i‹c.size; i++) cout ‹‹ c[i] ‹‹ "\n";
}

b1__16.cxx

#include ‹vector.hxx›

declare(vector,int);
implement(vector,int);

main
{
 vector(int) vv(10);
 vv[2] = 3;
 vv[10] = 4; // range error
}

b2_1_3.cxx

#include ‹stream.hxx›

int a = 1;

void f
{
 int b = 1;
 static int c = 1;
 cout ‹‹ " a = " ‹‹ a++
 ‹‹ " b = " ‹‹ b++
 ‹‹ " c = " ‹‹ c++ ‹‹ "\n";
}

main
{
 while (a ‹ 4) f;
}

b2_3.cxx

#include ‹stream.hxx›

main
{
 int* p = new int;
 cout ‹‹ "sizeof(int) = " ‹‹ sizeof(int) "\n";
}

b2_3_6a.cxx

#include ‹stream.hxx›

extern int strlen(char*);

char alpha[] = "abcdefghijklmnopqrstuvwxyz";

main
{
 int sz = strlen(alpha);

for (int i=0; i‹sz; i++) {
 char ch = alpha[i];
 cout ‹‹ "'" ‹‹ chr(ch) ‹‹ "'"
 ‹‹ " = " ‹‹ ch