Manual

142 Functions
Example
#include <string.h>
char s[20];
void f(char *p)
{
strncpy(s, p, 19); // Prevent overflow
s[19] = '\0'; // Force termination
}
strrchr( ) Function
The strrchr( ) function scans a string for the last occurrence of a given character.
The function scans a string in the reverse direction (hence the extra ‘r’ in the
name of the function), looking for a specific character. The strrchr( ) function
finds the last occurrence of the character
c in string s . The NUL ('\0') terminator
is considered to be part of the string. The return value is a pointer to the
character found, otherwise null. See also strcat( ), strchr( ), strcmp( ), strcpy( ),
strlen( ), strncat( ), strncmp( ), and strncpy( ).
Syntax
#include <string.h>
char *strrchr (const char *
s , char c );
Example
#include <string.h>
void f(void)
{
char buf[20];
char *p;
strcpy(buf, "Hello World");
p = strrchr(buf, 'o'); // Assigns &(buf[7]) to p
p = strrchr(buf, '\0'); // Assigns &(buf[11]) to p
p = strrchr(buf, 'x'); // Assigns NULL to p
}
swap_bytes( ) Built-in Function
The swap_bytes( ) built-in function returns the byte-swapped value of a . See also
high_byte( ), low_byte( ), and make_long( ).
Syntax
unsigned long swap_bytes (unsigned long a );