I am trying to implement singleton that I have used before in PHP and Java 8, to C++. But I do face certain restrictions from the syntax and how C++ works (specifically pointers).
This is what I have tried so far:
#include "iostream"
using namespace std;
class System{
protected:
static System *obj;
public:
static System *getInstance(){
return obj;
}
void prn(){
cout<<"this works!";
}
};
int main(void){
System &sys = System::getInstance();
sys.prn();
}
while executing, I get the following error:
sameer.cpp:20:10: error: non-const lvalue reference to type 'System'
cannot bind
to a temporary of type 'System *'
System &sys = System::getInstance();
^ ~~~~~~~~~~~~~~~~~~~~~
Please help me solve this error.. as I have no idea what it means. I have checked the forum before posting, and it can be a possible duplicate of previously asked question (which I caould not find).. But I posted this because I wanted to understand the meaning of error my code generated.
Thanks for the help