Die Variable
Allgemeine Form der Variablenvereinbarung:
Typ | Speicherbedarf | Inhalt | Werte | |||
in Byte (g++) | ||||||
char | 1 | Character-Zeichen | 'H', 'e', ' \n' | |||
bool | 1 | Booleanvariable | false , true [nur C++] |
|||
int | 4 | -32767, -231 | ||||
short [int] | 2 | Ganze Zahlen | -32767 | |||
long [int] | 4 | -32767, -231 | ||||
float | 4 | Gleitkommazahlen | 1.1, -1.56e-32 | |||
double | 8 | 1.1, -1.56e-32, 5.68e+287 | ||||
unsigned [int] | 4 | Natürliche Zahlen | 32767, 32769, 231 - 1 | |||
long long [int] | 8 | Ganze Zahlen | -231, 263 - 1 | |||
long double | 12 | Gleitkommazahlen | 5.68e+287, 5.68e+420 |
Bemerkungen:
/* Demo fuer sizeof-Operator */ #include <iostream.h> main() { int i; cout << " Size (int) = " << sizeof(int) << endl; cout << " Size ( i ) = " << sizeof( i ) << endl; } |