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strstr

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< c‎ | string‎ | byte

 
 
 
Null-terminierte Byte-Strings
Funktionen
Original:
Functions
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Character Manipulation
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Character manipulation
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Umwandlungen in numerische Formate
Original:
Conversions to numeric formats
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String-Manipulation
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
String Prüfung
Original:
String examination
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Speicher Manipulation
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Verschiedenes
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Miscellaneous
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strerror
 
Defined in header <string.h>
const char *strstr( const char* str, const char* substr );
      char strstr(        char* str, const char* substr );
Sucht das erste Vorkommen des Byte-String substr in der Byte-String, auf den str .
Original:
Finds the first occurrence of the byte string substr in the byte string pointed to by str.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

str -
Zeiger auf die null-terminierte Byte-String zu prüfen
Original:
pointer to the null-terminated byte string to examine
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substr -
Zeiger auf die null-terminierte Byte-String zu suchen
Original:
pointer to the null-terminated byte string to search for
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[Bearbeiten] Rückgabewert

Zeiger auf das erste Zeichen des gefundenen Substing str oder NULL wenn kein solches Teilstring gefunden. Wenn substr weist auf einen leeren String, wird str zurückgegeben .
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.
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[Bearbeiten] Beispiel

#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;
}

Output:

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

[Bearbeiten] Siehe auch

findet das erste Vorkommen eines Zeichens
Original:
finds the first occurrence of a character
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(Funktion) [edit]
wird das letzte Vorkommen eines Zeichens
Original:
finds the last occurrence of a character
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(Funktion) [edit]