sscanf question

[Zarkhalar]

Salem used sscanf in a snippet of code he gave me a bit ago, and it was interesting (I've always just done strstr parsing), but I need a bit more information about sscanf and I can't find it elsewhere x.X

The question I have is in sscanf, when using something like %[^:], it copies everything in front of the :. How would I get it to copy everything behind it? I tried removing the ^, but it just returned nothing :/

Thats all for now, Gotta sleep heh.. Thanks again =)

[Codeplug]

%[^:]:%[^:]

is one way.

gg

[quzah]

That depends if they want to use what's in front of it or not. If not:

sscanf( thisstring, "%*[^:]:otherscancodeshere", ... );

This will skip past the : and then you can add your other stuff. So will this:

char *p = strchr( thisstring, ':' );
...now call sscanf on p, assuming it's not null...

[edit]

%[^:]:%[^:]

is one way.

gg

And on an aside, no, it doesn't do that at all. It reads up to the colon and stores what is before it, and does nothing at all with what's beyond it.
[/edit]

Quzah.

[xddxogm3]

check this out and tell me if it helps at all

fscanf(infile,"%4[^,],%15[^,],%13[^,],%12[^,],"
	   "%17[^,],%10[^,],%11[^,],%14[^,],"
	   "%6[^,],%*c",
	   label1,label2,
	   label3,label4,
	   label5,label6,
	   label7,label8,
	   label9);

[Codeplug]

[edit]
And on an aside, no, it doesn't do that at all. It reads up to the colon and stores what is before it, and does nothing at all with what's beyond it.
[/edit]

Quzah.

Explain how the first "%[^:]" will extract and store a string but not the second?
Or if you'd rather, explain why the following code prints

2
abcd
efgh

using every sscanf() implementation I have access to.

    char test[] = "abcd:efgh";
    char a[15], b[15];

    int res = sscanf(test, "%[^:]:%[^:]", a, b);

    printf("%d\n%s\n%s\n", res, a, b);

Ah, good to be back on the boards.
gg

[Codeplug]

Just noticing that this isn't the C board - so here is the C++ equivalent which does not extract anything before the colon.

#include <sstream>
#include <iostream>
#include <string>
#include <limits>
using namespace std;

int main()
{
    istringstream in("abcd:efgh");
    string everything_after;

    if (in.ignore(numeric_limits<int>::max(), ':') &&
        getline(in, everything_after, ':'))
    {
        cout << "Everything after the colon: " << everything_after << endl;
    }//if
    else
    {
        cerr << "Failure while parsing" << endl;
    }//else

    return 0;
}//main

gg

[Zarkhalar]

I never use cout, or any of the iostream files. Are they easier? o_0;