In C programming the <string.h> memchr function search for the first occurrance of a character in a string.The declaration of the function is given below.
|void *memchr(const void *s, int c, size_t n);|
s -The pointer to string from which the character is to be searched for.
c -This value is converted to ‘unsigned char’ which is the character to be searched in ‘s’ string.
n -The initial size of the ‘s’ pointed string from which the character is to be searched.
void* – Returns a pointer to the located character,or a null pointer if the character does not occur in the object.
The ‘size_t’ type defined in string.h is usually an unsigned int.
void *retCh ;
int c1 = ‘a’, c2 = ‘T’;
printf(“%d\n” , strlen(s));
retCh = memchr(s , c1 , strlen(s) );
printf(“retCh=%c” , *((char*)retCh) );
retCh = memchr(s , c2 , strlen(s) ); //Returns NULL
/*printf(“\nretCh=%c” , *((char*)retCh) ); //throws exception in VS cause we are trying to access a NULL pointer