I want to split this:
char* value = "12;32;blue";
or
string value = "12;32;blue";
into this vars:
TV = 12;
AR = 32;
LED = "blue";
is it possible?
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2 Answers
For C-strings (char*), your best option (in terms of performance and memory consumption) is to use strtok:
char* value = "12;32;blue";
char* token = strtok(value, ";");
int TV = atoi(token);
token= strtok(0, ";");
int AR = atoi(token);
token = strtok(0, ";");
char* LED = token;
Note 1: the code above takes it for granted that value is properly formatted, i.e. contains 3 parts split by ;. If it is not sure, then you should add additional checks on token value returned by strtok.
Note 2: strtok is modifiying its value argument, so that at the end of the code above, value will not be equal to 12;32;blue any longer.
Note 3: LED variable above will point directly to the character b inside value, which means that if value is modified afterwards, LED might be modified as well.
Scan function should do the job.
int tv, ar;
char color[10];
sscanf(value, "%d;%d;%s", &tv, &ar, color);
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That's a great old trick. I totally forgot about it! daniweb.com/software-development/c/code/216535/…Jasmine– Jasmine2014-11-14 17:09:47 +00:00Commented Nov 14, 2014 at 17:09
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I think you meant
sscanfnotscanfas the latter needsstdinwhich Arduino doesn't have. Also in your example you shouldn't pass&color, but rathercolor.jfpoilpret– jfpoilpret2014-11-15 09:33:25 +00:00Commented Nov 15, 2014 at 9:33 -
and where do i tell the sscanf to get val from my var 'value' ?Lugarini– Lugarini2014-11-16 09:00:55 +00:00Commented Nov 16, 2014 at 9:00
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@Thiago: as first parameter. Corrected.TMa– TMa2014-11-16 11:16:08 +00:00Commented Nov 16, 2014 at 11:16