Question

I’m not quite sure even after reading the documentation how to do this with sscanf.

Here is what I want to do:
given a string of text:

Read up to the first 64 chars or until space is reached
Then there will be a space, an = and then another space.
Following that I want to extract another string either until the end of the string or if 8192 chars are reached. I would also like it to change any occurrences in the second string of “\n” to the actual newline character.

I have: “%64s = %8192s” but I do not think this is correct.

Thanks

Ex:

element.name = hello\nworld

Would have string 1 with element.name and string2 as

hello
world

Answer 1

I do recommend std::regex for this, but apart from that, you should be fine with a little error checking:

#include <cstdio>

int main(int argc, const char *argv[])
{
    char s1[65];
    char s2[8193];
    if (2!=std::scanf("%64s = %8192s", s1, s2))
        puts("oops");
    else
        std::printf("s1 = '%s', s2 = '%s'\n", s1, s2);
    return 0;
}