Scan Function

[Robert.SDSciences]

Hello,

Why does the following Scan function not work?  I want to extract individual strings from a single string that holds comma-separated values:

 char buff[128];
 char *szStrArray[128];

 Fmt(buff, "%s<%s", "1.23,4.56");
 Scan(buff,"%s>%s,%s", szStrArray[0], szStrArray[1]);

For example, if buff = "1.23,4.56", then I want szStrArray[0] = "1.23", and szStrArray[1] = "4.56".

What I observe is that szStrArray[0] = "1.23,4.56" and szStrArray[1] = "1.23,4.56"

I've tried a few variants--the most hopeful one being Scan(buff,"%s>%s[xt44]%s", szStrArray[0], szStrArray[1]);--but this didn't work, either (in fact, that clobbered buff [which it shouldn't have!] and resulted in buff = "4.56" and szStrArray[0] = "4.56" and szStrArray[1] = "4.56").

BTW, if I use two individual string variables (i.e. szTemp1 and szTemp2, instead of szStrArray[0] and szStrArray[1]), I still get the same results.

Thank you for any input!

[Robert.SDSciences]

I think I'll just use strtok().

It might have been better to implement Fmt and Scan CVI functions so that they conformed to the industry-standard rules and syntax of grep.

[RobertoBozzolo]

Seems that the problem is the definition of the destination array. Try using this modified version of your code:

int  i;
char buff[128];
char *szStrArray[128];
 
for (i = 0; i < 128; i++) {
 szStrArray[i] = malloc (20);
 memset (szStrArray[i], 0, 20);
}
Fmt(buff, "%s<%s", "1.23,4.56");
Scan(buff,"%s>%s[xt44]%s", szStrArray[0], szStrArray[1]);
DebugPrintf ("Source: %s\nItem1 = %s\nItem2 = %s\n", buff, szStrArray[0], szStrArray[1]);