Задача этой книги дать краткое и четкое изложение языка С++ в соответствии со стандар том iso/iec 14882. Она предназначена для студентов, изучающих язык «с нуля»

Ïðèìåð 1. Ïðîãðaììa ñ÷èòûâaåò ñòðîêè èç âõîäíîãî ïîòîêa â ñèìâîëüíûé ìañ- ñèâ.
inClude "iOstream.h" int main(){
COnst int N = 20, Len = 100; Char str[N][Len];
inti= 0;
while (Cin.getline(str[i], Len, '\n') && i// … i++;
}
return 0;
}
Ïðèìåð 2. Ïðîãðaììa çaïèñûâaåò â ôaéë (ôaéëîâûå ïîòîêè ðaññìaòðèâaþòñя â ñëåäóþùåì ðaçäåëå) ÷èñëî ñ ïëaâaþùåé òî÷êîé è ñòðîêó ñèìâîëîâ, a çaòåì ñ÷è- òûâaåò èõ èç ôaéëa è âûâîäèò ía ýêðaí:
inClude inClude inClude int main(){
// Çaïèñü â ôaéë Ofstream Out("test");

if(!Out){

COut << "CannOt Open file 'test' fOr writing" << endl; return 1;
}
dOuble num = 100.45;
Char str[ ] = "This is a test."; Out.write(reinterpret_Cast(&num), sizeOf(dOuble)); Out.write(str, strlen(str));
Out.ClOse();
// ×òåíèå èç ôaéëa ifstream in("test"); if(!in){
COut << "CannOt Open file 'test' fOr reading" << endl; return 1;
}
dOuble CheCk_num;
Char CheCk_str[60];
in.read(reinterpret_Cast(&CheCk_num), sizeOf(dOuble)); in.read(CheCk_str, 60);
int lstr = in.gCOunt(); // êîëè÷åñòâî ïðî÷èòaííûõ ñèìâîëîâ CheCk_str[lstr] = 0; // çaíåñòè íóëü-ñèìâîë â êîíåö ñòðîêè COut << CheCk_num << ' ' << CheCk_str << endl;
in.ClOse(); return 0;
}
Ïðèâåäåíèå òèïa reinterpret_Cast â âûçîâå ôóíêöèé write() è read() íå- îáõîäèìî â òåõ ñëó÷aяõ, êîãäa ïaðaìåòð íå яâëяåòñя ñèìâîëüíûì ìaññèâîì.
Ïðèìåð 3. Â ïðèâåäåííîé íèæå ïðîãðaììå ôîðìèðóåòñя ôaéë test, â êîòîðûé âûâîäèòñя òðè ñòðîêè.
inClude inClude inClude int main(){
// Çaïèñü â ôaéë Ofstream Out("test"); if(!Out) {
COut << "CannOt Open file 'test' fOr writing" << endl; return 1;
}
Char *str[ ] = {"This is the first line.",
"This is the seCOnd line.", "This is the third line."};
fOr (inti= 0; i<3; ++i){ Out.write(str[i], strlen(str[i])); Out.put('\n');
}

Out.ClOse();

// ×òåíèå èç ôaéëa ifstream in("test"); if(!in){
COut << "CannOt Open file 'test' fOr reading" << endl; return 1;
}
Char CheCk_str[3][60]; fOr (i = 0; i<3; ++i){
in.get(CheCk_str[i], 60); in.get();}
// Êîíòðîëüíûé âûâîä
fOr (i = 0; i<3; ++i) COut << CheCk_str[i] << endl; in.ClOse();
return 0;
}
Ïîñëå âûïîëíåíèя ôóíêöèè get(CheCk_str[i], 60) ñèìâîë-ðaçäåëèòåëü ñòðîê '\n' îñòaåòñя âî âõîäíîì ïîòîêå, ïîýòîìó íåîáõîäèì âûçîâ get() äëя ïðîïóñêa îäíîãî ñèìâîëa. Àëüòåðíaòèâíûì ñïîñîáîì яâëяåòñя èñïîëüçîâaíèå âìåñòî ôóíêöèè get ôóíêöèè getline, êîòîðaя èçâëåêaåò ñèìâîë-îãðaíè÷èòåëü èç âõîäíîãî ïîòîêa.