Zilog ZUSBOPTS Manual de usuario descargar pdf (Pagina 455)

100

101

UM017105-0511 Standard Functions

Zilog Developer Studio II – ZNEO™

User Manual

427

memchr

Locates the first occurrence of c (converted to an unsigned char) in the initial n charac-

ters of the object pointed to by s.

Synopsis

#include <string.h>

void *memchr(const void *s, int c, size_t n);

Returns

A pointer to the located character or a null pointer if the character does not occur in the

object.

Example

char *p1;

char str[]="COMPASS";

c='p';

p1=memchr(str,c,sizeof(char));

memcmp

Compares the first n characters of the object pointed to by s2 to the object pointed to by s1.

Synopsis

#include <string.h>

int memcmp(const void *s1, const void *s2, size_t n);

Returns

An integer greater than, equal to, or less than zero, according as the object pointed to by s1

is greater than, equal to, or less than the object pointed to by s2.

Example

char s1[]="COMPASS";

char s2[]="IDE";

int res;

res=memcmp(s1, s2, sizeof (char));

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