Namespace
Varianti

atoi, atol, atoll

Da cppreference.com.
< c‎ | string‎ | byte

 
 
 
Null-stringhe terminate byte
Funzioni
Original:
Functions
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Carattere manipolazione
Original:
Character manipulation
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Le conversioni in formati numerici
Original:
Conversions to numeric formats
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atof
atoi
atol
atoll
strtol
strtoll
Della gestione delle stringhe
Original:
String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
String esame
Original:
String examination
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Memoria manipolazione
Original:
Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Varie
Original:
Miscellaneous
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strerror
 
Defined in header <stdlib.h>
int       atoi( const char *str );
long      atol( const char *str )
long long atoll( const char *str );
Interpreta un valore intero in una stringa di byte puntato da str.
Original:
Interprets an integer value in a byte string pointed to by str.
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Funzione scarta eventuali spazi bianchi fino al primo carattere non-spazio si trova. Poi ci vuole come numero possibile di caratteri in modo da formare una rappresentazione valida numero intero e li converte in valore intero. Il valore intero valido consiste delle seguenti parti:
Original:
Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid integer number representation and converts them to integer value. The valid integer value consists of the following parts:
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  • (opzionale) più o segno meno
    Original:
    (opzionale) plus or minus sign
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  • cifre numeriche
    Original:
    numeric digits
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Indice

[modifica] Parametri

str -
puntatore alla stringa con terminazione null byte da interpretare
Original:
pointer to the null-terminated byte string to be interpreted
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[modifica] Valore di ritorno

Valore intero che corrisponde al contenuto di str in caso di successo. Se il valore convertito cade fuori dalla portata del tipo di ritorno corrispondente, il valore restituito non è definito. Se la conversione non può essere eseguita, viene restituito 0.
Original:
Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, the return value is undefined. If no conversion can be performed, 0 is returned.
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[modifica] Esempio

[modifica] Vedi anche

converte una stringa di byte in un valore intero
Original:
converts a byte string to an integer value
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(funzione) [edit]
converte una stringa di byte in un valore intero senza segno
Original:
converts a byte string to an unsigned integer value
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(funzione) [edit]
C++ documentation for atoi, atol, atoll