CODEWITHSUNDEEP
c++
ChrisD
ChrisD

Reputation: 674

Reading data into struct with istringstream

Suppose I have a struct with five data members:

struct Info {
    std::string name;
    std::string last_name;
    std::string school;
    int age;
    int dob;
}

And a string in the format: Joe Bob University 18 050797 where each field represents something I want to read into each member of the struct. I want to know for sure, that each data member in the struct was read in a value, and that the read did not fail. Is there an elegant way of accomplishing this? 

void fill_info(const std::string &line, Info *fields) {
    istringstream ss(line);
    ss >> fields->name;
    ss >> fields->last_name;
    ss >> fields->school;
    ss >> fields->age;
    ss >> fields->dob;
}

Upvotes: 0

Views: 300

Answers (1)

vsoftco
vsoftco

Reputation: 56547

You can perform the insertion in one line and test the stream 

if(!(ss >> fields->name >> fields->last_name >>\
     fields->school >> fields->age >> fields->dob))
    std::cout << "error reading the data";

If you want to see exactly which field failed, you can test each individual insertion. Then, you can validate the input.

Upvotes: 2

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