Espaces de noms
Variantes
Affichages
Actions

strstr

De cppreference.com
< c‎ | string‎ | byte

 
 
 
Chaînes d'octets à zéro terminal
Fonctions
Original:
Functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Manipulation caractère
Original:
Character manipulation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Conversion aux formats numériques
Original:
Conversions to numeric formats
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
La manipulation de chaînes
Original:
String manipulation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
strcpy
strncpy
strcat
strncat
strxfrm
Examen chaîne
Original:
String examination
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Manipulation de la mémoire
Original:
Memory manipulation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
memchr
memcmp
memset
memcpy
memmove
Divers
Original:
Miscellaneous
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
strerror
 
Defined in header <string.h>
const char *strstr( const char* str, const char* substr );
      char strstr(        char* str, const char* substr );
Trouve la première occurrence de la chaîne d'octets substr dans la chaîne d'octets pointée par str .
Original:
Finds the first occurrence of the byte string substr in the byte string pointed to by str.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Sommaire

[modifier] Paramètres

str - pointeur vers la chaînes d'octets à zéro terminal à examiner
substr - pointeur vers la chaînes d'octets à zéro terminal à rechercher

[modifier] Retourne la valeur

Pointeur sur le premier caractère de la chaîne dans str, ou NULL si aucune sous-chaîne n'est trouvé. Si substr pointe vers une chaîne vide, str est retourné.
Original:
Pointer to the first character of the found substring in str, or NULL if no such substring is found. If substr points to an empty string, str is returned.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifier] Exemple

#include <string.h>
#include <stdio.h>
 
void find_str(char const* str, char const* substr) 
{
    char* pos = strstr(str, substr);
    if(pos) {
        printf("found the string '%s' in '%s' at position: %d\n", substr, str, pos - str);
    } else {
        printf("the string '%s' was not found in '%s'\n", substr, str);
    }
}
 
int main(int argc, char* argv[]) 
{
    char* str = "one two three";
    find_str(str, "two");
    find_str(str, "");
    find_str(str, "nine");
    find_str(str, "n");
 
    return 0;
}

Résultat :

found the string 'two' in 'one two three' at position: 4
found the string '' in 'one two three' at position: 0
the string 'nine' was not found in 'one two three'
found the string 'n' in 'one two three' at position: 1

[modifier] Voir aussi

trouve la première occurrence d'un caractère
Original:
finds the first occurrence of a character
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction) [edit]
trouve la dernière occurrence d'un caractère
Original:
finds the last occurrence of a character
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction) [edit]