Strchr - Texas Instruments TI-89 Developer's Manual

990

strchr

Declaration: char * strchr (const char * str , int c )
Category(ies): Strings
Description: Locates the first occurrence of the character c in the string pointed to by
str . The character c may be any character including the null character (\0).
str — Character string to search.
Inputs:
c
Returns a pointer to the first occurrence of c in str . If c is not in str , strchr
Outputs:
returns a null pointer.
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: strrchr, memchr, strspn, strcspn, strpbrk, strstr
Example:
short KeyYesOrNo( WORD Key )
/* If Key is ENTER or is an alpha and in XR_YesStr return TRUE,
if it is ESC or is an alpha and in XR_NoStr return FALSE,
otherwise return -1.
*/
{
if (Key == KB_ENTER)
return TRUE;
if (Key == KB_ESC)
return FALSE;
if (Key <= 0xFF) {
if (strchr(XR_stringPtr(XR_YesStr), (BYTE) Key ))
return TRUE;
if (strchr(XR_stringPtr(XR_NoStr), (BYTE) Key ))
return FALSE;
}
return -1;
}
TI-89 / TI-92 Plus Developer Guide
— Character to locate.
Not for Distribution
Appendix A: System Routines — Strings
Beta Version January 26, 2001