Super newbie questions

This is a discussion on Super newbie questions within the C++ Programming forums, part of the General Programming Boards category; Have a look Mats: Code: #include <iostream> #include <string> #include <sstream> using namespace std; int main() { sringstream sinout; sinout ...

  1. #16
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    Have a look Mats:

    Code:
    #include <iostream>
    #include <string>
    #include <sstream>
    using namespace std;
    
    int main()
    {
    	sringstream sinout;
    	sinout << "number: " << 13 << "is un-unlucky!";
    	string s;
    	sinout >> s;
    	cout << s << endl;
    	return 0;
    }
    error C2065: 'sringstream' : undeclared identifier
    c:\my\src\cpp\test-bed\test-bed.cpp(94) : error C2146: syntax error : missing ';' before identifier 'sinout'

  2. #17
    Chi! whiteflags's Avatar
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    Argh, come on people. Effort! manav, just read the error: what is the typo supposed to be written as? You can do it.

  3. #18
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    i can't! sorry!! what's the typo?

    EDIT: damn! so sorry citizen! so sorry Mats!
    Last edited by manav; 04-16-2008 at 07:12 AM.

  4. #19
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    Quote Originally Posted by manav View Post
    i can't! sorry!! what's the typo?
    sringstream should be stringstream.

    Because it's such a long (and single case) name, it's hard to spot the missing t.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  5. #20
    C++ Witch laserlight's Avatar
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    Because it's such a long (and single case) name, it's hard to spot the missing t.
    Slightly off topic:
    I have been known to #include <iosteam>
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  6. #21
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    Code:
    #include <iostream>
    #include <string>
    #include <sstream>
    using namespace std;
    
    int main()
    {
    	stringstream sinout;
    	sinout << "number: " << 13 << "is un-unlucky!";
    	string s;
    	sinout >> s;
    	cout << s << endl;
    	return 0;
    }
    compiles fine!
    runs strange!!

    output>>
    number:

  7. #22
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    Yes, stringstream, like iostreams, stops reading strings on encountering a space - use getline if you want to avoid that. Which is one reason my example didn't include any text [the other reason is that I'm too lazy].

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  8. #23
    C++ Witch laserlight's Avatar
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    That output is expected, since "number:" is the first substring in the stream before the first whitespace character.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  9. #24
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    yeah . . .
    i again wish that this was possible:
    Code:
    string s;
    s << "number:" << 13 << " is un-unlucky!";

  10. #25
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    Quote Originally Posted by manav View Post
    yeah . . .
    i again wish that this was possible:
    Code:
    string s;
    s << "number:" << 13 << " is un-unlucky!";
    This will do what you want (I'm 99% sure)
    Code:
    stringstream ss;
    ss << "number:" << 13 << " is un-unlucky!";
    string s = ss.str();
    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  11. #26
    C++ Witch laserlight's Avatar
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    We could modify your example to work as you apparently want it to work:
    Code:
    stringstream sinout;
    sinout << "number: " << 13 << "is un-unlucky!";
    string s(sinout.str());
    cout << s << endl;
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  12. #27
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    thanks Mats!
    it fails laserlight! just the same as i posted!

  13. #28
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    it fails laserlight! just the same as i posted!
    I think you looked at my accidental posting... I hit the "post quick reply" button while trying to edit your example.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  14. #29
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    wow! the speedy helpers! but very nice! all of you! thanks!

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