Getting an error when linking files
"one or more multiply defined symbols found"
i am linking a cpp file and header file and inside my header file
i have #ifndef
#define
...code
#endif
Anyone have a solution???
Linking Files
Getting an error when linking files
"one or more multiply defined symbols found"
i am linking a cpp file and header file and inside my header file
i have #ifndef
#define
...code
#endif
Anyone have a solution???
Conflicting identifiers I guess. Check if you have any variables/function named the same as another.
Is it simply:or do you have an identifier for what you're defining?Code:#ifndef #define /* Code here */ #endifCode:#ifndef MY_LIB_H #define MY_LIB_H #endif
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I'm assuming by that you mean you have something like this:i have #ifndef
#define
...code
#endif
Code:#ifndef SOMECLASS_HEADER_H #define SOMECLASS_HEADER_H /* code */ #endif
Code:#include <cmath> #include <complex> bool euler_flip(bool value) { return std::pow ( std::complex<float>(std::exp(1.0)), std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0) *(1 << (value + 2))) ).real() < 0; }
yes i have #ifndef SOME_HEADER_H
#define SOME HEADER_H
then are there multiple headers enclosed in the same identifier SOME_HEADER_H?
Code:#include <cmath> #include <complex> bool euler_flip(bool value) { return std::pow ( std::complex<float>(std::exp(1.0)), std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0) *(1 << (value + 2))) ).real() < 0; }
Nope. I was reading around aparantly MSVS has this problem alot.
"one or more multiply defined symbols found"...
odd. try it with another compiler and see if the results are the same...
Code:#include <cmath> #include <complex> bool euler_flip(bool value) { return std::pow ( std::complex<float>(std::exp(1.0)), std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0) *(1 << (value + 2))) ).real() < 0; }
Hopefully by "...code" you don't mean code, but instead merely delcarations and such. Definitions of functions and data must done exactly once.Originally Posted by MT_Pockets
7. It is easier to write an incorrect program than understand a correct one.
40. There are two ways to write error-free programs; only the third one works.*
