CODEWITHSUNDEEP
c++
user3723105
user3723105

Reputation: 3

sscanf equivalent for std::string

I have a string of the form std::string str = "1001 0104 2325 9999" and I need to store these four substrings seperated by spaces in integers . Is there an elegant way to do this task like there is with strings in C(using sscanf) ? This is not a homework question .

Upvotes: 0

Views: 1880

Answers (1)

Jerry Coffin
Jerry Coffin

Reputation: 490108

The cleanest way would probably be to use a stringstream with an istream_iterator, something like this:

std::string str = "1001 0104 2325 9999";

std::istringstream in(str);

std::vector<int> numbers {
    std::istream_iterator<int>(in),
    std::istream_iterator<int>()
};

// just to show what we did:
for (int i : numbers)
    std::cout << i << "\n";

Note that there is a little bit of ambiguity in the input you provided: it's not clear whether you intent the 0104 to be decimal or octal (as a leading zero would cause it to be interpreted in source code). The code I've written above interprets it as decimal. If you want a leading 0 to mean octal (and leading 0x to mean hexadecimal) you can do that (at least if memory serves) by setting the base for the conversion to 0.

Upvotes: 1

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