Name
memcmp
Synopsis
Compares two memory blocks
#include <string.h> intmemcmp
(const void *b1
, const void *b2
, size_tn
);
The memcmp()
function
compares the contents two memory blocks of
n
bytes, beginning at the addresses in
b1
and b2
,
until it finds a byte that doesn’t match. The function returns a
value greater than zero if the first mismatched byte (evaluated as
unsigned char
) is greater in
b1
, or less than zero if the
first mismatched byte is greater in b2
, or zero if the two buffers are
identical over n
bytes.
Example
long setone[5] = { 1, 3, 5, 7, 9 };
long settwo[5] = { 0, 2, 4, 6, 8 };
for ( int i = 0; i < 5; i++ )
settwo[i] += 1;
if (memcmp
( &setone, &settwo, sizeof(settwo) ) == 0 )
printf( "The two arrays are identical, byte for byte.\n" );
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