warning: function returns address of local variable [-Wreturn-local-addr]

Question

I get this error when compiling and have checked out other questions here with no further progress:

funciones.c: In function ‘Lyapunov’: ../funciones.

Answer 1

You can use malloc as suggested, but looking at your code better idea would be to have a single static buffer passed to a function to have it's result (since you are using the buffer just once, and then discarding it's data), such that the function signature will be:

void Lyapunov(int ai, int bi, unsigned char rgb[]);

Then prior the use of the function you will need to define the buffer:

unsigned char rgb[3];

and then use it in your loop

Lyapunov(col,linea, rgb);

This way you will not need to worry about any memory leaks (resulting from the function).