home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Power CD-ROM!! 7
/
POWERCD7.ISO
/
prgmming
/
clipper
/
chrcount.c
< prev
next >
Wrap
C/C++ Source or Header
|
1993-10-14
|
2KB
|
74 lines
/*
* GT CLIPPER STANDARD HEADER
*
* File......: chrcount.c
* Author....: Andy M Leighton
* BBS.......: The Dark Knight Returns
* Net/Node..: 050/069
* User Name.: Andy Leighton
* Date......: 23/05/93
* Revision..: 1.00
*
* This is an original work by Andy Leighton and is placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* $Log$
*
*/
/*
* $DOC$
* $FUNCNAME$
* GT_CHRCOUNT()
* $CATEGORY$
* String
* $ONELINER$
* Count the number of times a character appears in a string
* $SYNTAX$
* GT_ChrCount(<cChr>, <cStr>) --> nFreq
* $ARGUMENTS$
* <cChr> - The character to find the frequence of
* <cStr> - The string in which to find the character
* $RETURNS$
* nFreq - The number of times <cChr> occurs in <cStr>
* $DESCRIPTION$
* GT_ChrCount() counts how many times a specified character
* appears in a string.
*
* NOTE:
* invalid parameters will return -1
* $EXAMPLES$
*
* ? GT_ChrCount("t", "the cat sat on the mat") // prints 4
*
* $END$
*/
#include "extend.h"
CLIPPER
gt_chrcoun()
{
char *s1, *s2;
int count, pos2, len;
if (ISCHAR(1) && ISCHAR(2)) {
s1 = _parc(1);
s2 = _parc(2);
len = _parclen(2);
/* loop through s2 matching passed character (s1) with
each character of s1 */
for (count = 0, pos2 = 1; pos2 <= len; s2++, pos2++)
if (*s1 == *s2) // character matches s1
count++; // increment counter
_retni(count); // return result
} else {
_retni(-1); // parameter mismatch - error -1
}
}