Hi there, I am new to C++ and I got this error.
IntelliSense: no operator "+" matches these operands
The problematic line of code is:
cout << i << "\t" << temp->VehicleNo + "\n";
Link to picture showing context of error
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nrussell
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Lawrence Wong
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Can you show your code and the error trace? That would help. – Reinstate Monica -- notmaynard Jan 10 '13 at 15:32
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Can you show us that "Picture of Error"? – Mysticial Jan 10 '13 at 15:32
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It's difficult to say specifically, because you haven't posted any code. But in general, this means that you're trying to add two things that can't be added. – Oliver Charlesworth Jan 10 '13 at 15:32
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please use something else to upload the picture, or link the picture directly. Or even better, paste the relevant (!) code directly into the question. – Femaref Jan 10 '13 at 15:33
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Picture of error http://i.imgur.com/IgKHn.jpg – Lawrence Wong Jan 10 '13 at 15:38
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4Can't you just replace `+` with `<<` ? – Greg Witczak Jan 10 '13 at 15:41
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2You should paste the problematic code (`cout << i << "\t" << temp->VehicleNo + "\n"`) into the question, along with the text of the error. We'll also need to know the type of `VehicleNo` to figure out why you can't add a string literal to it. But as @gogowitczak says, you almost certainly want `<<` rather than `+`. – Mike Seymour Jan 10 '13 at 15:45
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Hi there, I tried and I got this http://i.imgur.com/GIZ6J.png – Lawrence Wong Jan 10 '13 at 15:48
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@LawrenceWong: What is the type of `temp->VehicleNo`? And please post text, not images. – molbdnilo Jan 10 '13 at 15:53
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Please could you show us the definition for the "Node" class/struct? – nrussell Jan 10 '13 at 15:55
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Use `<< endl` instead of `+ "\n"`. – dreamzor Jan 10 '13 at 16:10
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Did you remember to `#include
` in this code? – Blastfurnace Jan 10 '13 at 16:12 -
We need to know the type of `VehicleNo`, and the code declaring that type, else answering this will be as good as impossible. – antonijn Jan 10 '13 at 16:27
1 Answers
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So, temp->VehicleNo is object of class Vehicle and this class has a member VehicleNo of type std::string. To display that string you need this code:
cout << i << "\t" << temp->VehicleNo.VehicleNo << "\n";
I would propose that you rename Node::VehicleNo to Node::Vehicle, so that in the code above the code would be temp->Vehicle.VehicleNo, which makes more sense.
Dialecticus
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Hi there, VehicleNo is a string. So how do i resolve this problem? – Lawrence Wong Jan 10 '13 at 15:50
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Hi there, Error 1 error C2039: 'c_str' : is not a member of 'Vehicle' 2 IntelliSense: class "Vehicle" has no member "c_str" How do i resolve this? – Lawrence Wong Jan 10 '13 at 15:56
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Then VehicleNo is not `std::string`, but of type `Vehicle`, which is a class. We need to know what are the interesting members of this class. – Dialecticus Jan 10 '13 at 16:00
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And please do not put an image of the class. Copy and paste relevant code into your original question. – Dialecticus Jan 10 '13 at 16:01
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Under the vehicle class, I have string VehicleNo; declared inside the class. – Lawrence Wong Jan 10 '13 at 16:01
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1Try `temp->VehicleNo.VehicleNo` or `temp->VehicleNo.VehicleNo.c_str()`, or even `temp->VehicleNo->VehicleNo.c_str()`. It would be faster if you would provide enough information, so that we don't have to play the guessing game. – Dialecticus Jan 10 '13 at 16:06
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You don't need `c_str()` to print a `std::string` to `std::cout`. – Blastfurnace Jan 10 '13 at 16:11