struct complexe {
    float Re;
    float Im;
};

struct complexe saisir_complexe();

void affiche_complexe(struct complexe);

struct complexe conjuge(struct complexe);

struct complexe oppose(struct complexe);

struct complexe inverse(struct complexe);

float module(struct complexe);

float argument(struct complexe);

struct complexe add_complexe(
    struct complexe,
    struct complexe
);

struct complexe mult_complexe(
    struct complexe,
    struct complexe
);

struct complexe div_complexe(
    struct complexe,
    struct complexe
);