#pragma once typedef struct { float x; float y; } Vector; #define VECTOR_ZERO ((Vector){0, 0}) Vector vector_add(Vector a, Vector b); Vector vector_sub(Vector a, Vector b); Vector vector_mul(Vector a, Vector b); Vector vector_div(Vector a, Vector b); Vector vector_addf(Vector a, float b); Vector vector_subf(Vector a, float b); Vector vector_mulf(Vector a, float b); Vector vector_divf(Vector a, float b);