Passing array to library function

Question

I'm trying to pass an array to a library (written in c++) but the error:

undefined reference to `MyLib::arrayTest(int*)'
collect2: error: ld returned 1 exit status
Error compiling.

Is being produced.

My Code Is As Follows:

Testing.ino:

MyLib test = MyLib(5,4,6);
void setup(){
 int arr[10];
 test.arrayTest(arr);
 Serial.println(arr[0]);
}

MyLib.h:

class MyLib {
 public:
 MyLib(int x, int y, int z);
 void arrayTest(int* n);

MyLib.cpp:

void arrayTest(int* n){
 n[0] = 15;
}

Any help is greatly appreciated :)

• Majenko: class MyLib is incomplete.
• StackNinja: I have that correct in the code I just made a mistake when posting the question, sorry about that

Answer 1

This function:

void arrayTest(int* n){
 n[0] = 15;
}

is lacking the class qualifier:

void MyLib::arrayTest(int* n){
 n[0] = 15;
}

• Majenko: @StackNinja Easily done. I have done it myself numerous times.