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memchr

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< c‎ | string‎ | byte
Revision as of 13:08, 9 May 2014 by Newatthis (Talk | contribs)

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Defined in header <string.h>
void* memchr( const void* ptr, int ch, size_t count );

Converts ch to unsigned char and locates the first occurrence of that value in the initial count characters (each interpreted as unsigned char) of the object pointed to by ptr.

Contents

[edit] Parameters

ptr - pointer to the object to be examined
ch - character to search for
count - number of characters to examine

[edit] Return value

Pointer to the location of the character, or NULL if no such character is found.

[edit] Example

#include <stdio.h>
#include <string.h>
 
int main(void)
{
    char str[] = "ABCDEFG";
    char *ps = memchr(str,'D',strlen(str));
    if (ps != NULL)
       printf ("search character found:  %s\n", ps);
    else
       printf ("search character not found\n");
 
    return 0;
}

Output:

search character found:  DEFG

[edit] See also

finds the first occurrence of a character
(function) [edit]