locate the first occurrence of a given character in a string
#include <string.h> char *strchr( const char *s, int c ); char __far *_fstrchr( const char __far *s, int c );
The strchr() function locates the first occurrence of c (converted to a char) in the string pointed to by s. The terminating null character is considered to be part of the string.
The _fstrchr() function is a data-model-independent form of the strchr() function. It accepts far pointer arguments, and returns a far pointer. It's useful in mixed memory model applications.
A pointer to the located character, or NULL if the character does not occur in the string.
#include <stdio.h>
#include <string.h>
void main()
{
char buffer[80];
char *where;
strcpy( buffer, "video x-rays" );
where = strchr( buffer, 'x' );
if( where == NULL ) {
printf( "'x' not found\n" );
}
}
strchr() is ANSI; _fstrchr() is WATCOM.
| Safety: | |
|---|---|
| Interrupt handler | Yes |
| Signal handler | Yes |
| Thread | Yes |
memchr(), strcspn(), strrchr(), strspn(), strstr(), strtok()