how to access parts of string in c

[adi108]

hi

how does one access parts of string in C.

string comes back like this in Hyperterminal

LITL0 0000
LITL1 0759
LITL2 0014
LITL3 0024

need to access the numbers
is there a function in C similar to substr in C++?

thank you

[Ganon11]

You can use strtok() to seperate the string by spaces and get to the numbers. See more on strtok() here.

[AdrianH]

LITL0 0000
LITL1 0759
LITL2 0014
LITL3 0024

need to access the numbers
is there a function in C similar to substr in C++?

You can use scanf() or sscanf() but you need to take some pecautions when using them. I usually use a %n to ensure that that point has been gotten to in the parse.

int position = 0; // must be initilised
scanf("LITL%*[0-9] %d%n", &number, &position);
// check that position is not 0.
 

FYI, be careful about parsing numbers starting with 0. C/C++ libraries may parse them as octal (base 8) instead of decimal (base 10). You may wish to strip the leading zeros prior to using a C/C++ library function.

If you are still having problems, let us know.


Adrian