The functions memcmp( ) and memicmp( ) compares first n bytes of given two blocks of memory or strings. However, memcmp( ) performs comparison as unsigned chars whereas memicmp( ) performs comparison as chars but ignores case (i.e. upper or lower case). Both the functions return an integer value where 0 indicates that two memory buffers compared are identical. If the value returned is greater than 0 then it indicates that the first buffer is bigger than the second one. The value less than 0 indicate that the first buffer is less than thesecond buffer. The following code snippet demonstrates use of both#include <stdio.h>#include <mem.h>main() {char str1[] = "This string contains some characters" ;char str2[] = "this string contains" ;int result ;result = memcmp ( str1, str2, strlen ( str2 ) ) ; printf ( "\nResult after comapring buffer using memcmp( )" ) ;show ( result ) ;result = memicmp ( str1, str2, strlen ( str2 ) ) ; printf ( "\nResult after comapring buffer using memicmp( )" ) ;show ( result ) ;}show ( int r ){if ( r == 0 )printf ( "\nThe buffer str1 and str2 hold identical data" ) ;if ( r > 0 )printf ( "\nThe buffer str1 is bigger than buffer str2" ) ;if ( r < 0 )printf ( "\nThe buffer str1 is less than buffer str2" ) ;} C
Topic: Functions
The functions memcmp( ) and memicmp( )
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The functions memcmp( ) and memicmp( )
