Thread: sscanf and string handling question

I need help using sscanf. I have googled it and have been testing this for a few days and i just cant get it right.

I have a string, lets say:

Code:

char *line="term1=the cat&term2=M"

I need to read "the cat" and "M" and put them in two separate strings.

I figured at first that i could divide the string in two with:

Code:

sscanf(line, "%[^&],%[^&]", string1, string2);

and get "term1=the cat" on string 1 and "term2=M" on string2 and use sscanf on those in turn.

I use this sscanf line with strings with a "," instead of a "&" and no "=" and it separates the words perfectly regardless of blank spaces, but i cant get it to separate this string since the space confuses it. (and me too)

Any ideas?

thanks

The space confuses nothing. The comma confuses sscanf, since you claim the line has a comma in it which it manifestly does not.

the line has no comma its just "term1=something something&term2=somethingelse"

i follow u, sorry. I thought i needed that.

However, it still doesnt work. it extracts the first half "term1=the cat" but it ignores string2.

post the updated sscanf()

I did know about the^ but i wasnt sure how to work with that... Heres how i solved it

Code:

char *line="term1=something something&term2=something2";
char *string1, *string2, *x);

sscanf(line, "%[^&]&%[^&]", string1, string2); //string1="term1=something something"
                                                                   // string2="term2=something2"

sscanf(string1, "%[^=]=%[^=]",x, string1);  //string1="something something"

sscanf(string2, "term2=%s", string2);  //string2= "something2"

Well, ive been handling several strings with multiple &s in them. It is working like that... i guess i could also do something like

Code:

 sscanf(line, "%[^&]&%s", string1, string2);

that worked too, thanks!

Code:

#include <stdio.h>

main()
{
    char *line = "term1= the cat &term2= M ";
    char one[100], two[100];
    
    if (sscanf(
            line,
            "%*[^=]="
            "%99[^&]&"
            "%*[^=]="
            "%99[^\n]",
            one,
            two
        ) != 2)
        return 1;
    printf(".%s.\n.%s.\n", one, two);
    
    return 0;
}

here sscanf has limit and more uniform for characters, I suggest to separate line before the processing by & and then process every part with one algorithm (because it has two equal parts "%*[^=]=" and then, when it separated, it can be "%*[^=]=%99[^\n]" format string for every part of separated source line)
then you can put it in the function and so on ...