000
29.10.2015, 11:40 Uhr
Ginso
|
Hallo, ich möchte ein Singleton prommarien. Hier ist mein Code:
Header:
| Code: |
#pragma once
#include <stdio.h>
class MLog
{
public:
MLog(void);
~MLog(void);
static MLog* getInstance();
FILE* file;
template <typename ... Ts>
void writef(const char* format, Ts ... ts)
{
fprintf(file,format,ts...);
}
/*template <typename ... Ts>
static void write(const char* format,Ts ... ts)
{
getInstance()->writef(format, ts...);
}*/
protected:
static MLog* s_instance;
};
|
source:
| Code: |
#include "MLog.h"
MLog::MLog(void)
{
file = fopen("D:\\Temp\\log.txt","W");
}
MLog::~MLog(void)
{
fclose(file);
}
MLog* MLog::getInstance()
{
if(!s_instance) s_instance = new MLog();
return s_instance;
}
|
Beim Erstellen erhalte ich folgenden Fehler:
error LNK2001: Nicht aufgelöstes externes Symbol ""protected: static class MLog * MLog::s_instance" (?s_instance@MLog@@1PAV1@A)". |
