how to use strtok()?

[slizorn]

the thing is.. i need to read a text file
[code=cpp]
<matrix>
rows = 2
cols = 2

1 2
2 4
</matrix>
[/code]
and i need to store the data in a double array [10][10]..
where the matrix max size is 10 by 10...
also i nid to extract the values of rows and cols and save it to row and col variables..
i got a suggestion to use strtok()..
but i am not sure how to do so...
could someone tell me how in relation my problem above?
thanks in advance

[kreuzen]

Strtok() basically tokenizes your string (string tokenizer function). You input a string and specify the delimiters to where it should be split.

So for example, if you have

char string[1024] = "I,know,how,to, use,strtok"; (delimiters are the commas)
char delim[512] = ",';

Output:
I
know
how
to
use
strtok

then you put strtok(string, delim). You can put multiple delimiters so you're not limited to one. Example: char delims[512] = ",-@" . This will cut the string when it sees a comma, a dash, or the "at" sign.



Hope that helped.

[slizorn]

Strtok() basically tokenizes your string (string tokenizer function). You input a string and specify the delimiters to where it should be split.

So for example, if you have

char string[1024] = "I,know,how,to, use,strtok"; (delimiters are the commas)
char delim[512] = ",';

Output:
I
know
how
to
use
strtok

then you put strtok(string, delim). You can put multiple delimiters so you're not limited to one. Example: char delims[512] = ",-@" . This will cut the string when it sees a comma, a dash, or the "at" sign.



Hope that helped.

ah i see what u mean...
but how am i to get it to skip lines and read and store the values?
i can do the storing values into the matrix but how to do it..when i need the data on the right hand side of the line col = 2; ????

[weaknessforcats]

If I were reading doubles into a 10x10 array, I would read 100 doubles as though I had 100 double array.

That is, the memory layout of:
double arr[10][10];

and

double arr[100];

is the same.

Read this: http://bytes.com/forum/thread772412.html. Look at the last example.