CODEWITHSUNDEEP
c++streamstringstream
Hikaru
Hikaru

Reputation: 33

Does stringstream ignoring whitespaces?

I was reading about stringstream and found this example.

stringstream ss;
int foo;
int bar = 0;

ss << 100 << ' ' << 200;
ss >> foo;
ss >> bar;

cout << "foo: " << foo << '\n'; // 100
cout << "bar: " << bar << '\n'; // 200

Why the value of variable 'bar' is 200? Shouldn't a 'bar' read a space from stream and get an ASCII code for space (32), or some other values? Does stringstream ignoring whitespaces? Then why if we add a line here:

ss >> foo;
ss.ignore(1);
ss >> bar;

the bar's value still 200 isntead of 0?

Upvotes: 2

Views: 5681

Answers (1)

David G
David G

Reputation: 96800

Does stringstream ignoring whitespaces?

Technically the operator>>() function ignores leading whitespace. Doing ss.ignore(1) is a way to do it manually, but it's unnecessary.

On the other hand, the function std::getline() does not skip whitespace. So if there is leading whitespace you will have to remove it manually.

Upvotes: 1

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