# Struct (structure)
###### tags: `Teaching material`, `C++`, `structure`

## Why struct?
Grouping data
## Declare

// purely
struct point {
    int x;
    int y;
    
    struct point operator + (struct point& p) {
        return { this->x + p.x, this->y + p.y };
    }
};

struct point p1 = {1, 0};
struct point p2 = {0, 1};
struct point p3 = p1 + p2; // {1, 1}

// with typedef
struct point {
    int x;
    int y;
};
typedef struct point point;

point p = {1, 0};

// with typedef (shorter)
typedef struct point {
    int x;
    int y;
} point;

point p = {1, 0};

## Initialize

point p1;
p1.x = 1;
p1.y = 0;

point p2 = {1, 0};

point p3 = {
    .x = 1,
    .y = 0
};

## Interact with function, array
pass by value!! (same as primitive type)

struct point plusOne(struct point) {
    return { point.x + 1, point.y + 1};
}

struct point plusOne(struct point) {
    point.x++;
    point.y++;
    return point;
}