'comparison is always true due to limited range of data type' warning in C?

Question

I have the following code

//Point.h
#define WIDTH 8
#define HEIGHT 8

typedef struct Point
{
  char x;
  char y;
} Point;

//Board.c
#include 

        

Answer 1

Hummm... isn't your char unsigned by default? In that case the range would be 0-255, which means your >=0 comparison would be always true