Defined in header <string.h> | ||
|---|---|---|
void* memchr( const void* ptr, int ch, size_t count ); |
Finds the first occurrence of ch (after conversion to unsigned char as if by (unsigned char)ch) in the initial count characters (each interpreted as unsigned char) of the object pointed to by ptr.
The behavior is undefined if access occurs beyond the end of the array searched. The behavior is undefined if ptr is a null pointer.
| This function behaves as if it reads the characters sequentially and stops as soon as a matching character is found: if the array pointed to by | (since C11) |
| ptr | - | pointer to the object to be examined |
| ch | - | character to search for |
| count | - | max number of characters to examine |
Pointer to the location of the character, or NULL if no such character is found.
#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
| finds the first occurrence of a character (function) |
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