I am prototyping something for a big project, but i got a funny error saying that string is ambiguous I have never seen this before, and i have been writing my code this way for forever.
[source lang="cpp"]#include "stdafx.h"#include <iostream>#include <string>#include <cstdlib>#include <ctime>using namespace std; class Creature{public: Creature(int strength, int health, int armor, string name); --string error void getHealth(); int modifyHealth(int modifier, int type); //type = 1(add), or 2(remove) int attack(); int block();private: int m_Strength; int m_Health; int m_Damage; int m_Armor; string m_Name; --string error int num;};[/source]
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9 replies to this topic
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#2 Members - Reputation: 819
Posted 19 November 2012 - 09:08 PM
I think you should take away the
and use
instead of
But I found that on google's first result. Perhaps you didn't <search engine of choice> hard enough?
using namespace std;
and use
std::string
instead of
string
But I found that on google's first result. Perhaps you didn't <search engine of choice> hard enough?
Edited by ultramailman, 20 November 2012 - 01:06 AM.
#3 Members - Reputation: 343
Posted 19 November 2012 - 09:33 PM
i always come here first. I diid try that and it didnt work
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#5 Moderator* - Reputation: 5361
Posted 19 November 2012 - 09:44 PM
Don't do that. You should explicitly include the headers you need. But you're absolutely right about using namespace std;. A global using namespace ...; should never go in a header.That doesn't work? Then how about removing
#include <string>
Because usually iostream also includes string.
@OP: You should always Google first. It's a fantastic skill to learn. What are your other headers/sources doing? Is anything defining string before your header? Anything in stdafx.h? Typically it's caused by something like this example.
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#6 Moderators - Reputation: 6623
Posted 19 November 2012 - 09:50 PM
It looks like you're using MSVC from the stdafx.h in your headers. If that's the case, then you might want to look at the full build output rather than the summary in the task pane. It will probably tell you the exact source of the ambiguous symbols.
#8 Crossbones+ - Reputation: 3517
Posted 19 November 2012 - 10:16 PM
I would expect the OP to have bigger problems if his standard headers don't have include guards though
Don't do that. You should explicitly include the headers you need
True, I just thought that might be a last resort that magically fixes OP's problem. It's improbable, but I thought maybe his string header doesn't have include guards.
#10 Members - Reputation: 913
Posted 20 November 2012 - 02:54 AM
The problem is that string is defined as std::string, and it must be being defined somewhere else too, but there's not enough information posted to work out where. If you get rid of the 'using namespace std;' line and add the necessary std:: bits, then the error will go away.
It's often considered unwise to use the 'using' keyword in a header file. I'd advise you to get rid of that habit, and keep any 'using' stuff to your .cpp files.
It's often considered unwise to use the 'using' keyword in a header file. I'd advise you to get rid of that habit, and keep any 'using' stuff to your .cpp files.
