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strstr

De cppreference.com
< c‎ | string‎ | byte

 
 
 
Terminadas en nulo de bytes
Funciones
Original:
Functions
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De manipulación de caracteres
Original:
Character manipulation
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Las conversiones a formatos numéricos
Original:
Conversions to numeric formats
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Cadena de manipulación
Original:
String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
Cadena examen
Original:
String examination
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Memoria manipulación
Original:
Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Varios
Original:
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 );
Busca la primera ocurrencia de la cadena de bytes substr en la cadena de byte apuntado por str .
Original:
Finds the first occurrence of the byte string substr in the byte string pointed to by str.
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Contenido

[editar] Parámetros

str -
puntero a la cadena de bytes de terminación nula a examinar
Original:
pointer to the null-terminated byte string to examine
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substr -
puntero a la cadena de bytes terminada en cero que desea buscar
Original:
pointer to the null-terminated byte string to search for
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[editar] Valor de retorno

Puntero al primer carácter de la subcadena encontrada en str, o si no NULL subcadena se encuentra dicho. Si substr apunta a una cadena vacía, se devuelve str .
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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[editar] Ejemplo

#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

[editar] Ver también

encuentra la primera aparición de un carácter
Original:
finds the first occurrence of a character
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(función) [edit]
considera que la última aparición de un carácter
Original:
finds the last occurrence of a character
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(función) [edit]