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n*******r
发帖数: 22 | 1 在Visual Studio上编译总是有错，哪位大侠能不能帮我看看是什么原因？
error LNK2019: unresolved external symbol "private: __thiscall
Singleton2::Singleton2(void)" (??0?$Singleton2@H@@AAE@XZ)
referenced in function "public: static class Singleton2 * __cdecl
Singleton2::GetInstance(void)" (?
GetInstance@$Singleton2@H@@SAPAV1@XZ)
// Singleton.h
template class Singleton2
{
private:
Singleton2(void);
~Singleton2(void);
Singleton2(const Singleton2&);
Singleton2& operator=(const Singleton2&);
static Singleton2* instance;
public:
static Singleton2* GetInstance();
};
template Singleton2* Singleton2::instance = NULL;
template Singleton2* Singleton2::GetInstance()
{
if ( instance == NULL )
instance = new Singleton2;
return instance;
}
// Main program
#include "Singleton2.h"
void main()
{
Singleton2* s1 = Singleton2::GetInstance();
} | r*******m
发帖数: 109 | 2 because your default constructor is not defined. use this.
Singleton2(){};
【在 n*******r 的大作中提到】
: 在Visual Studio上编译总是有错，哪位大侠能不能帮我看看是什么原因？
: error LNK2019: unresolved external symbol "private: __thiscall
: Singleton2::Singleton2(void)" (??0?$Singleton2@H@@AAE@XZ)
: referenced in function "public: static class Singleton2 * __cdecl
: Singleton2::GetInstance(void)" (?
: GetInstance@$Singleton2@H@@SAPAV1@XZ)
: // Singleton.h
: template class Singleton2
: {
: private:
| n*******r
发帖数: 22 | 3 You're right! Thanks for the help.
【在 r*******m 的大作中提到】
: because your default constructor is not defined. use this.
: Singleton2(){};
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