Is there pre-defined operators for raylib's Vector2 in C++?

Are these operators pre-defined or am I doing something wrong? I did try to compile but also gave same error. By the way, same is happenning with all Vector2 ops.:( Here is the code:

#include "raylib.h"
#include "raymath.h"
#include <algorithm>

using namespace std;
int main(void)
{
    InitWindow(800, 450, "raylib [core] example - basic window");
    SetWindowState(FLAG_VSYNC_HINT);
    while (!WindowShouldClose()){
        BeginDrawing();
        ClearBackground(RAYWHITE);
        DrawFPS(10,10);
        EndDrawing();
    }

    CloseWindow();

    return 0;
}        

class Particle {
    public:
        Vector2 pos;
        Vector2 vel;
        Vector2 acc;
        void Update() {
            vel += acc;
            pos += vel;
            acc -= acc;
        }
        void Show(Color c) {
            DrawCircle(pos.x,pos.y,5,c);
        }

};

Operator overloading is a C++ feature, which is added by raylib-cpp, while raylib itself is a C library, and C doesn't support operator overloading.

Raylib-cpp is a header-only library, you only need to download it and put its #include directory somewhere inside your project and tell the compiler to add this #include directory to your project's include directories.