"A non-static member reference must be made relative to a specific object"

[Kirk Locke]

Hey, I'm new to C++ so I've just been toying around with it, but every time I attempt to use a method inherited from the header file using the scope operator, I keep getting that message. Making it as straightforward as possible, this is the segment of code that brings up the error;


//---Data.h---
#include <iostream>
using namespace std;

class Data {
public :

int Fingers;
void WhichFinger(int I);
};



//---Data.cpp---
#include <iostream>
using namespace std;

#include "Data.h"

void const WhichFinger (int I){
if (I = 1){
std::cout << "Left Pinky Finger";
}

if (I = 2){
std::cout << "Left Ring Finger";
}

if (I = 3){
std::cout << "Left Middle Finger";
}

if (I = 4){
std::cout << "Left Index Finger";
}

if (I = 5){
std::cout << "Left Thumb";
}

if (I = 6){
std::cout << "Right Pinky Finger";
}

if (I = 7){
std::cout << "Right Ring Finger";
}

if (I = 8){
std::cout << "Right Middle Finger";
}

if (I = 9){
std::cout << "Right Index Finger";
}

if (I = 10){
std::cout << "Right Thumb";
}
};


//---Main.cpp---
#include <iostream>
using namespace std;

#include "Data.h"

int main (){
int number;
std::cin >> number;

(Error appears here) Data::WhichFinger(number);
}

[weaknessforcats]

I see the function WhichFinger but I do not see the function Data::Whichfinger.

Further, Data::WhichFinger is a member function so you will need a Data object in order to call it:

Data obj;
obj.WhichFinger(etc...) //calls Data::WhichFinger

[Kirk Locke]

Oh, alright, I see what the problem was. I was attempting to call the function outside of an object that had the function as a member. Thanks a lot for the answer